I have the fiskars shape cutter and I Love it! I have a lot of templates, and I use the diamonds, stars and hearts, and assorted shapes the most. Next in usage for me is an alphabet set, banners and windows. And I really like the borders on the edges of the templates. I don't have any problems with corners, you do have to practice to get the hand of it and I think the key is to go slowly and to keep the cutter level on the templates. Sometimes to do this, especially with the borders I put another template close so that the other side of the cutter is resting on the same level while cutting. I also like cutting free form shapes without any template. For ovals and circles, I love the CM system as you have more options with those.