Love this bed!! I went with the 10” mattress, and I love the mattress, but the height definitely takes away from the backboard. If you want more to show, stick with the 8”. MyThe 10” mattress from wayfair is soooo comfy though so it’s fine. I haven’t bought another mattress for the trundle yet, so I can’t review the bottom portion but it is beautiful and the blue velvet is so great! My dog loves this bed too, so I guess it’s his now.