Good question...I believe a mattress 11" or less is better. The thickest I've sold in recent years was 13"..it's hard to get the correct elevation from the base with thicker mattresses. This is personal preference. If you elevate a really thick mattress on the base, you can see how difficult it is to have it conform and follow the "bends" in the adjustable base. When a mattress is too thick, it depends too much on your body mass to make it conform more...let the base do it's job with an appropriately designed mattress.

One other observation...when you buy a "celebrity" endorsed mattress, you tend to pay more for the name...just a thought. There are probably better values out there. I believe you'll love having an adjustable base...that's the optimal way to sleep!

Excellent question. It depends on how heavy you are. If the mattress is really thick and you are really light, you won't get the proper conformation of mattress to base. Also, it seems that the mattress in question is an inner spring and I am not a big fan of putting an innerspring mattress on an adjustable base. It isn't great for the springs and also the foam edge encasement.

It's best to go with a mattress that doesn't have springs like gel/memory foam or latex and keep the thickness level to one which will give good conformance to the base when you are adjusted.

Hope this helps.

If the mattress is too thick, you'll find that it won't bend as easily. If you keep it at a maximum of 13", you shouldn't have any trouble. Also, firmer mattresses don't bend as easily as softer ones, but the softer mattresses will wear out faster. With the head and foot raised, your body weight will shift to the spot under your butt. It's at this point in the mattress, where it will show wear first.

Hi! Thanks for your question. Briefly the answer is no. However, keep in mind that if you have a wall hugging base, which is designed to keep night stands close, you will defeat the purpose. We have successfully put mattresses up to 15 inches on adjustable bases. As long as the mattress is bendable, there should be no problem.
One bit of curiosity, what did the sales rep you talked to say? Usually reps are great resources for questions like this.

Hope this helps! Sleep Well!