I use mine all the time. I don't have any of the applique' shapes, just the geometric ones, strips, triangles, squares etc. that I can use for many different quilt block patterns. For me, the accent is on accuracy, not speed. I don't cut more layers with my machine than I would attempt to cut with a hand rotary cutter (no more than 4). I love that my piecing is so easy because everything fits (I am careful with my 1/4" seams). many of the geometric dies have engineered corners, which aid in lining the pieces up. I've read that some people think it wastes fabric, but I don't see any more waste than when you square your fabric up when hand cutting. I don't think I cut any faster, just more accurately.