I have both a Hopen and a Malm bed from Ikea, bought them off of craigslist just to get something in my house. There are TONS of Ikea beds on CL, at least around here. They are typical Ikea veneer, so the finish won't hold up, but I like the style and they are sturdy enough. I don't really see how it could fall apart. The Malm style night stands don't sit at the exact same level as the bed because they don't sink into the carpet as much as the bed. The Hopen headboard could be stronger. But whatever, Ikea is not meant to be family heirloom furniture. I just like their styling.
Don't know much about Ikea mattresses, I bought mine from The Original Mattress Factory. They're an independent east coast retailer that still makes mattresses you can
actually flip. The mattress industry is full of a HUGE amount of bullshit marketing. It's really ridiculous.
http://www.slate.com/articles/life/shopping/2000/11/going_to_the_mattresses.single.html
My two biggest pet peaves are the "no flip" mattress (they only have to make one side of the mattress instead of two, but guess what, the price is the same!), and the pillow tops. The pillowtop is retarded, it is simply a $75 topper you can buy on Amazon that is permanently sewn onto the mattress. Now you're stuck with it, you can't change it if you don't like it or it wears out.
Do this instead. Buy a cheap, firm mattress for 300-400. Go to Amazon and look at their pillow tops. Buy 3 or 4 of them for maybe 200-300 bucks. Try the ones you like
in your actual bedroom while you actually sleep, return or throw out the ones you don't, and you have the perfect mattress for $500.
http://www.amazon.com/Sleep-Studio-3...attress+topper
http://www.amazon.com/Season-Down-Al...attress+topper
http://www.amazon.com/Sleep-Better-3...attress+topper
http://www.amazon.com/Sleep-Defender...attress+topper
People here love to tell you "You spend a third of your life sleeping, spend the money on a good mattress." You know who else loves that thought process? Mattress salesman.