I just bought the making memories circle cutter. since this is my first circle cutter, I have nothing else to compare it too. It works fine for me..does the job. I have punches to cut circles 1.0" - 1.50"
I trace around anything I have to get that just right size circle, and I cut them out with my cuticle scissors. The curved edge works great. I have other cutting things to work with, but I always go back to them!
I use the Creative Memories cutter system. It has 3 circle guides. The circle guides have a groove in it and the actual cutter piece fits in it. The cutter pieces are 3 different sizes so each guide allows you to cut 3 differnt size circles. It works great and you have lots of options.
If you want to cut a picture in a circle you pick the size. If you pick a smaller circle you can cut bigger ones from the same guide and make matts for your picture.
The best one is the Fiskars Shape Cutters, I use all the templates that are available, I find them much easier then the CM if your not sure what I mean then have a look http://shapecuttersforscr apbooking.blogspot.com/ I think it may show you CM's as well?
I use my cuticle scissors, I have used the same pair for several years. The curve helps with my cutting small pieces in my paper piecing and works for circles too. So I just find something in my home to trace around that's the size I want and cut it out. i save the money for some other scrapbook item.
I love my Creative Memories circle cutters...they're awesome! I now have the Cricut Expression but will still use my CM cutter. I have the George & Basic Shapes cartridge that I bought from an individual and it is great for basic stuff!