I have 2 Fiskars, 45 and 60, and the rest are Olfa. I have one 18 mm; one 60 mm; two 28s, one straight and one ergonomic; two straight 45s ; and at least two ergonomic 45s. One of the straight 45s is used for the pinking blades. I prefer the ergonomic to the straight. I don't like the slide lock of the regular ones. I may have more, but I think this is correct.
Leslie