We love almost everything about adjustables and anything we disliked, we fixed. Normally when you purchase either Dual King or Queen, also known as Split King or Queen, we have found that the beds will split apart during the night or during pre-sleep rituals if you get my drift. So we fixed it. As of November 2019, our Serenity Plus mattresses are customized to never split apart and we are the only company with this feature. We are always improving.