Amazon Prime Shipping

thats weird, I just placed an order this morning and mine is guaranteed for Sunday delivery.

 If you have a distribution center close to you that has the item you want in stock, I would think you would get it much faster than if the closest one with inventory in stock was several states away. They're building one in our metro area right now, so I would imagine that my already pretty fast Prime shipments will get here even quicker once there is a distribution center right in my state.

I've noticed Prime isn't always consistently 2 days lately. The 2 day promise is if the item is in stock and "available" for shipping, which gives them a buffer to start the 2 day promise when the item "becomes available". Technically it is 2 business days so sometimes an item ordered on Fri will show a Tues delivery. Our area has regular Sat & Sun deliveries but that isn't an option for all areas. I've received inital notice that something will arrive in 3 days and had it actually deliver in 2 days.

DD picks up super inexpensive phone cases ($2-5) that are indentified as Prime shipping and can take 10-14 days. She isn't complaining because they are so inexpensive the shipping would be more than the case if it wasn't Prime but I think it is odd that they are identified as Prime.

What bc2ca said. I've gotten items ordered late on Friday on a Sunday morning and ordered on a Monday and had it delivered a week later, all with Prime.

Their 2-day shipping just isn't so.
I've had issues several times with this, but it was never anything urgent so I never complained. I, too, felt that the free part of the shipping was good enough.
I like that it's free, but they really shouldn't advertise 2 day as a selling point. I can look through my shipping history and find several instances when it was three, four or even more days. I do the majority of my shopping through them as I like the smile program that benefits my local humane society and also it saves me from going out to the store.
However...the other day I ordered a gift for someone. It was marked with the Prime symbol and there was no indication that it wouldn't make it in time. Well, it didn't show up and I didn't receive a shipped notification. I will say that THIS time I was upset about it, as I wanted to have the gift when I needed it, not tell my friend that it was 'on the way.'
I called their customer service number and they did give me a month extension on my Prime membership, which I was happy about but I still had to run out at the last minute and buy a replacement gift. Then Amazon cancelled the order all together which was fine as I no longer needed it. It was a book.
I guess from now on I WILL call each time they are late, and get yet another month extension. Heck I could have already added 6 months to my membership at least if I'd called every time in the past.

Yes, I have noticed that it seems to a bit slower than usual. I haven't checked exactly but there is a decline.

It's a bummer too, because we have 2 distribution centers here (one is less than 10 minutes from my house) but I always seem to order stuff that comes out of Las Vegas.

Not too long ago that was a $1 digital credit. I chose that several times and my items arrived just as quickly as they normally did with prime. I must have gotten lucky. 

I have noticed a decline in their speediness, too. And out of the 3 times in my entire Prime history that I paid the $3.99 for one-day shipping, it only actually arrived on time once.

The later to be delivered items most likely come from a distribution center further from you. My thinking is that with Amazon Prime being so popular they have had a huge increase in orders and maybe need to expand. I know I often use the '1 click' check out, which means 1 item is packaged for shipment. Later I may do this again. My bill from Amazon was over $400.00 this month. That's a lot of buying and often I'd receive multiple packages a day.

Amazon Prime is of the Devil!

Actually, this is pretty much the exact situation with the book I ordered (see above post.) 
The CSR told me they were sorry but it wasn't available to ship until about 5 days later (AFTER the day that I called, which was the day AFTER the 2day Prime date should have seen delivery!) I was very unhappy about that and said that nowhere on the item page, the shopping cart page or anywhere else before or even after I placed my order did they state that. It in fact did state 2-day Prime shipping. 
I told her I would be calling every single time they didn't deliver with the 2-day when the item was listed as 2-day Prime shipping eligible. She said to do just that. I'm sure they see this time and again with upset customers but I wonder how many customers just suck it up and don't bother to call. As I said, I know I had let it slide many times. Not again. 

The thing is...free 2-day shipping is the ONLY advantage of ordering an item marked with that symbol. It isn't because you get better prices on Prime products, the opposite is true. Almost every product marked Prime can be found cheaper and with FREE shipping as long as it is part of an order that meets the free shipping total.
So if you order something marked Prime eligible it absolutely should have that 2-day free shipping.

I usually order at least $35 to get free shipping. Do you think that having access to Amazon movies is worth the cost of Prime? I already have Netflix, so probably wouldn't use that a lot, so to me, Prime isn't really free if you have to pay $100 for it. Of course if you would normally pay more than that in a year on shipping, I guess it would. I was considering Prime, because I don't always have $35 worth of stuff to buy, and I thought the whole 2-day shipping thing was the big selling point, but it sounds like I shouldn't bother.

Perhaps I'm lucky, but I always get two day shipping, though occaionally it HAS been business days and I'm fine with that. However, last week something DID arrive on Sunday that I ordered on Friday and I was really surprised. I've got no complaints about their service.

As for Prime being worth it, I do think it is. I order enough throughout the year to make the shipping money back. I don't take much advantage of the streaming, though I use it occasionally, but I do use the free library book for my Kindle. I also have the Echo, so I like the Amazon Prime music that's included.