I like the fusible battings but have found the reason some people would think only for small projects is because you need to be able to lay out the backing/ batting (wadding)/ and top- smooth- the press evenly the whole thing- its not easy to do on an ironing board if doing a large quilt- the largest I've used it on was a full sized quilt- I laid down a queen sized cotton batting, then put flannel on top of that (to protect my floor) then I laid out my quilt sandwich- backing, fusible batting, top- and on hands & knees pressed the whole thing- flipped if over & pressed the other side. it worked ok- but was a lot of work. so yes, small projects are easier.