It depends on your back. I bought one and used it to hand quilt my first baby quilt many, many years ago. Worked fine back then. Nowadays I would not be able to use it because of my back. Even with the extra lifters, to tilt the frame, it would be more bending than I could do without major problems.
For me, an adjustable lap hoop works well. Here's a link to my favorite:
http://www.keepsakequilting.com/prod...PTOP-HOOP-.htm