I have a Brother 15oo with a proflex frame. So I guess you could classify it as a "mid arm" No more wrestling with the weight of the Quilt.I have also seen this frame set up with a Juki.
You do need some room. I have mine set up at 10ft. Some people disassemble...I am too lazy for that.
I want to upgrade my machine so, I can have more quilt area. Overall I am happy with my purchase. Practice is required fo sure.