Such a great adjustable bed! The vibration setting seems to work better on low or medium than high. It was something that I wasn’t sure I would enjoy, but it is a nice feature that I have used frequently so far! One bed (split king) upon set up was a couple of inches higher than the other at the head, however with the mattress on top it isn’t noticeable. I just hope this doesn’t have any long term effects with the bed. Also, the light has been flickering underneath, not sure what that’s about but doesn’t bother me too much. If it weren’t for The few small issues Above, I would have ranked it a 5. Overall, it’s been SO comfortable to sleep on/sit up and read. I look forward to jumping in bed every night! Great price and very competitive with other adjustable bed bases.. just with a lower price tag!