My LQS got one of the Brother dream fabric frame in and I played on it some. I have questions about how useful it would be if you want to be doing all-over patterns or pantographs on anything larger than a lap quilt since you have to move larger quilts side to side which means you couldn't do a complete pass without having to stop, unmount the quilt and slide it to the side.
It was fun to play on, but I like the freedom to do larger designs that I get using my domestic machine as a sit-down fmqer.
Rob