I have slept on these mattresses for about 7 years now. I have a Cal King double nest coil mattress for my husband and I. I still love my mattress as much now as I did then. The mattress still looks virtually like new, no dips, sags or butt ruts. My husband, who is career military, is proud to say he can sleep anywhere, and although this is true, he often complains of shoulder and back discomfort in other mattresses. In fact, on a recent deployment, he purchased and took along a twin pillow topper from Berkeley Ergonomics to make his barrack bunk more comfortable. For myself, it’s hard to travel or go on vacation because I notice within an hour, the difference in breathability between my mattress and the synthetic mattresses at every hotel I’ve ever stayed in! Even paying upwards of $500 a night at a certain theme park hotel, I found myself waking overheated due to trapped humidity. I also have one of their wool filled comforters for the added breathability it provides. I will never go back to down!
When we had children, we purchased twin mattresses as well as wool comforters for them (selfishly because I often end up in their beds at night). But the secondary benefit is I don’t have to worry that I am exposing them to potentially harmful chemicals while they are sleeping. I am definitely a Berkeley Ergonomics customer for life.