I have a Go Baby which is manual. I rarely use it because most things I sew aren't the exact size of my dies. I did find it very handy when making the Hunter's Star, though I gave that die away after I made the quilt. I got it because I have wrist issues, but I find that if I replace my rotary cutter blades I do just fine. I keep thinking of selling my Go Baby but hang onto it just in case.