UPDATE in OP - Adjustable beds - need opinions

We have one, which I frankly do not find all that comfortable, but my DH loves it. Ours was from Costco a few years back -- two twin beds that fit together inside a frame to be a King. My parents stayed over once and used our room-- my mom found the bed to be uncomfortably high for her to get into it -- she needed a boost to get up, and she's not unusually short -- like 5'5". There's no way to lower the bed, so I would say that height is a key piece to be sure you are ok with.

With the adjustable features -- not sure if all beds have it, but you may want to be sure that it will go to flat with batter back up -- if you have power outages it would suck to have the bed stuck in knee lift or some odd configuration.

I have the Tempurpedic. You can get whatever mattress you want, it's the base that raises and lowers. Dh and I love ours. It really does help with dh's snoring, and I can lift my legs and recline during the day, raise the head of my bed when I'm hurting too badly to lie down relatively flat. 

Before this bed, I was sleeping on a ton of pillows because lying down completely flat was too painful for my pancreatitis. Now I can sleep reclined, put me feet up or down, and adjust the bed for sleeping on my side or back. 

I like the tempurpedic material because it's so soft yet supportive to my joints. 

I have a latex allergy, so I was really restricted on what mattress I could buy. We have the regular tempurpedic, but it isn't very hot. I have the night sweats anyway. I sleep with a lightweight down comforter, and we keep our room at 68. I sleep so much better than I used to sleep.

My doctors recommended that I take naps and sleep as much as I can since your body heals in your sleep. I've actually had some nerve regeneration, which is excellent news. 

I have a lot of insomnia because of my illness and pain, but I do sleep when I can. This bed has really made a difference.

We just got a Serta adjustable bed about a month ago.

Ours is a few inches higher than our old regular mattress, but not terribly high - and the base came with two sets of legs - different heights so it could be lower if we wanted (although the bed skirt we already had would be too long to use if we used the shorter legs). Ours has a cushy top on it, which is nice, but the bed is firm underneath that.

We tested a lot of beds. We very quickly rejected the Tempurpedic ones. Neither of us liked the way they sink down under you and don't come back up quickly. We just didn't like them a lot.

Our bed is one mattress. I think all the ones on the display floor were, and the salesman said almost everybody who gets the split ones ends up disliking them. Most people don't like the "ridge" in the middle that you get with two separate mattresses.

Ours hasn't solved the snoring issue, but it wasn't presented to us that it would. It does take some strain off our backs when the head is raised even a little. It's much nicer to watch TV or read in bed with the adjustable feature. We've been experimenting with different angles for sleeping and usually have the head raised at least a little.

When we went looking for beds, I very quickly realized I liked the adjustable beds more than I thought I would. It made lying on a totally flat bed feel weird. It cost a chunk more to get the adjustable features but so far I think it was worth it.

I love love LOVE my sleep number bed. I got the adjustable frame and that's part of what I love, I think. I just ridiculously love it.

Doesn't help with any snoring though

I would like an adjustable bed to help with reflux and also headaches. But would I have to give up my sleigh bed? I don't think an adjustable base would fit, would it? I love my pretty bedroom furniture.

Since you bought a split king, why don't you buy yourself a twin mattress that you like and replace the sleep number mattress on your side?  Then you can both have what you like.  

You probably won't have to give up your sleigh bed! our adjustable bed is on a metal frame that just sits right inside the wood bed frame that matches the bedroom set!

My parents bought two king adjustable beds, one to have at each sister's home. When she moved back here a few weeks ago, she brought one side of the king to set up in my dining room since her good queen bed here is being used by my niece and her daughter.

She told me it and the other side are mine when she passes away. I'm unable to sleep without sitting up a bit due to my spinal pain. I've trained myself to sleep on these special support pillows from Relax The Back that put you in the same position as an adjustable bed would do.

Mom loves hers and the times I've used it were so comfortable for me. Her mattress is like a temporpedic, but isn't that brand. It came with the frame setup.