We have only had the adjustable base for about a month, but very satisfied with the product. Even though the motor is very quiet our mini Aussie puppy seems to have an issue, but she will have to adjust.
This base does exactly what we wanted! We didn't need phone plug ins, massaging features...we just wanted to be able to enjoy the zero gravity feature and it does that perfectly. You can still raise your head or feet separately which I like! It fit perfectly into our existing queen size frame also. In my opinion, if you are splurging on one of these pricey mattresses you need the base to get the full experience.
I'd been thinking about purchasing an adjustable base for the last 5 years and I'm so glad I finally did it. It has really changed the way I sleep and my overall comfort. Once adjusted, I'm able to fall asleep quickly and stay asleep throughout the night. I wake up with fewer aches and pains than I used to. If you're on the fence, just do it! It's not that much in the grand scheme and I think it's a game changer.