I'll share my experience. I bought a sit-down (Handiquilter Sweet 16) in April and I really regret not going for the long-arm instead. I had done a lot of practice on my domestic so I was comfortable moving the quilt so I didn't buy a stitch regulator. Yes, there's plenty of room to maneuver the quilt, but there's a big difference moving a fat quarter around and moving a full quilt. Even having the entire quilt on the table so there's no drag, I found it didn't move as easily as the smaller quilt sandwiches I practiced on. Also there's the constant stopping to move my hands, so I'm quilting about a 6-8 inch space before having to stop. I recently rented time on a long-arm and I loved it. I did just a simple loops and swirls pattern, and I finished a 70x70 quilt top in about an hour and a half. So now I'm trying to sell my sit-down so I can upgrade to a long-arm.