I bought this to use as a laptop desk for sitting at the sofa and I couldn't be happier. It's also great for eating in front of the TV, which is admittedly a bad habit. I haven't tried to use it in bed, but I'm sure it's great for that too, assuming your bed isn't too tall.
The ability to adjust the height and angle makes for a highly ergonomic fit. This table accommodates and provides stable support for my heavy, 17" gaming laptop and still has room for a fat wrist rest and full-sized mouse pad for my wireless mouse. While its looks could be sexier (in a perfect world, the tray would be made of wood, metal or frosted glass instead of plastic), it WAS dsigned as a medical aid, and its functionality could not be better. At some point I may take some plastic spray paint to the tray top, but it's not truly offensive looking so I haven't bothered at this time.
In a nutshell, I highly recommend.