There is one customer review of it on Amazon:
http://www.amazon.com/Grace-Storage-...dp/B006W6YIIG/
Personally, I think a lap hoop is more versatile (and easier to store) than a floor hoop. I have heard good things about the Grace lap hoop (and there are reviews of these on Amazon) but have not used it myself. My favorite is a lap hoop that swivels on a wooden ball, but it is no longer made. The Grace lap hoop is the closest I have seen to mine in that it has enough open space that it does not interfere with the underneath hand, and is easily adjustable for angle and tilt.
There are advantages and disadvantages to a larger hoop size. A larger hoop means you need to re-hoop less frequently; however, the distance to reach can become uncomfortable. My lap hoop is probably more on the order of 14". Maybe the larger hoop size is more useable in the floor frame setup, though.