I love my EK Success small circle cutter - the one that spins inside the frame. I like the small increments, and that you can hold spare blades in the handle.
I have repurposed the tempered glass tray from inside my defunct microwave as my cutting surface, so that was a bit of a saving.
I wish I had better reports about Fiskars things. Their scissors are good, but it seems like a lot of their punches or other cutters end up failing. The ones in the classroom at work are mostly busted after pretty short times. Are they just temperamental and need to be babied? I don't know.
Say, how do I add a link to the product as others have done?