I bought the Pfaff Quilt Expression 4.0 machine and have so many problems with Guttermann thread. When I took my machine in for the umpteenth time over threading problems the dealer told me it was the thread and they don't recomend Guttermann. I buy all my Guttermann from JoAnns. Like many of you I've ended up running it off on bobbins when it doesn't seem to work on top.