I love my Martelli cutter. I think it is the 45. I have very small hands and I find it really fits my hand. Sometimes the pressure I needed to do on the other cutters was a pain in my whole arm. I will admit, I do not have the proper table height either. A few months ago I was in a class and needed to replace my blade in my Martelli and the man that helped me turned the screw the wrong way. So when I tried it, it locks up. Martelli told me to send it in and they will replace it for $12.50 so I have my box ready to go. I miss that thing so much and I had to finish a quilt so had to revert back to the other kind. I would recommend it highly but be sure to mark which way the screw is to be taken off.