Yeah, just get a changing mat and if you're back is okay you can use it wherever. If you have a section or a bad back, you just need something at the right height. We bought this for DS's room, it did the trick in terms of storage and height www.ikea.com/gb/en/catalog/products/00062597/
If you can't find one you like, you don't have to get one at all. The bed or floor will do nicely. In fact if your LO is anything like my DD was you will be safer without. As soon as she could move she would fight like a demon at every nappy change.
Do bear in mind that people with complaints tend to post reviews more than those happy with something. Not much help overall though, sorry.
We've got the ikea one and i think it's great for the price. I know its one of those things that people say is a waste of money but i find it so useful and its definitely saved my back. Also you can never predict when your gonna have a poonami or they'll pee whilst changing and it keeps body fluids contained instead of spilling over onto bed/sofa/carpet!