For large quilts it takes more room than a long arm. Think about it, you are guiding the quilt from one end to the other thru your sewing machine. You need a large table and you have to have pvc pipes to roll on the table to keep the frame on. You cannot hold the thing up without the pvc pipes to roll on. My pvc kept falling off the table as they dont roll straight.
It is fine for small quilts but so is your sewing machine. Free motion for small quilts works fine on your regular sewing table.