My son is very busy and orders a lot of stuff from Amazon instead of spending precious time in stores. I spent most of November and just about all of December with him and his kids last year. During that time, he ordered 2 new twin sized mattresses and a full-sized mattress from Amazon.com! I would have never thought of that.
Then you have to let the mattress rest so it can plump up to its maximum size before you use it. I think it was 48 hours, but I may not remember the time correctly. It felt like a really long time since the mattresses that were being replaced were so worn out.
They aren’t the best mattresses I’ve been on, but certainly not the worst either and worth the money they cost, I do believe.