I have LG II with a 13" Bailey on it and I love it. I have it set up for the smaller size because I make a lot of throw and baby quilt. It's a good quality frame. I use the side clamps too to help keep the sandwich taut while quilting. I do have a stitch regulator but you don't need one - it just makes it easier.
If you can find a good deal, go for it. You won't be sorry.