I have had a Bernina Quilt Frame since they were first introduced. At first I used my Bernina 440 on it with very limited quilting space so all my quilts were meander quilted. Christmas 2013 brought me a Bernina 710. Now my quilting area is much larger and I am starting to try other quilting designs. However, I wish I had a real long arm with a real hopping foot. I bought a ruler to make circles but the slot you would guide the hopping foot into to stitch the circle is too narrow for my Bernina feet. So it all depends on what you want to do with it. The 710 stitches like a dream though and I do like the larger quilting area.
If I were to do it again I think I might look at other frames first. I might like other methods used to attach your quilt to the frame other than velcro which isn't permanently attached to the rails. But I do like that the frame can be set up 6' or 12' so it's adaptable to small spaces. I have it set up at 12' since I mostly quilt bed size quilts on it.
If you do buy it, look up how to assemble it on YouTube. It will guide you through it step by step.
Also, before you buy check out the new Bernina long arm. If money isn't a problem, this might be just what you want.