I got this Beautyrest Silver BRS900-C Extra Firm Mattress and its really an excellent mattress! This feels high quality to me and its truly is extra firm. This is built in a solid way and feels durable. I do not use boxsprings and this mattress is working great on my wooden bed frame. It did take me a couple days to get used to this mattress at first, but then I grew to love it more and more each day. This provides strong support due to it being extra firm. My body feels completely supported when lying down on this. Its very comfortable for me and I like the way it feels. This is one of the best mattresses I've ever slept on in my life. I highly recommend this if you are looking for an extra firm mattress. This mattress is comfortable while providing extra firm support.