I don't use a frame either. I usually just use a hoop in my lap so I can sit back in my chair or wiggle around as needed to be comfortable. I've always thought frames would be (for me) very uncomfortable to use as you (I think) sit in the same position the entire time you are quilting.
The hoop I use is just a cheapie from JoAnn's. Works just fine for my use. And if/when it breaks after several years of use it doesn't break the bank to replace.