The super slider was the pits for me. I ended up throwing it out!
The bicycle clips to roll and clip the quilt-not!
The big red rubber fingertips things, not.
could probably think of more, I do love the Fons & Porter brand and the Clover. not disappointed so far there.
I do like the sidewinder, it is great and use it all the time.
The genie bobbin washers work well and then I got to where I don't even use them.