I Have 2 Juki TL 98E and I have made lots of quilts on them. Up to at least a queen and possiably a king, I don't really measure my quilts, I go by the measurements in the book. They get a bit tight when doing the very center, nothing I can't handle. They are work horses and quilt as long as I want to. I have the knee lift also but I don't use it. It gets in my way and don't find it an asset. I think they are very good machines for the money.