I have a lot of Fiskar's from the tiniest one (at least one of these), 2 of the 28's and 4 or 5 of the 45's and one of the 60. Since I have been quilting for so long, I got most all of these, with the exception of the original ones, when they were on sale for 50% or 60% off from JA's.
However, I do have 2 45's of Martelli and one 60 of Martelli's. I actually like the Martelli cutters much better, especially the 60. Unfortunately, I just had a problem with the spring of the 60 Martelli and I can't get it back in and now I have to wait to go to the quilt show in Santa Clara in October for them to fix it. I looked at the YouTube video to see how to fix it and it seems that some how my spring looks like it got bent, so it won't stay in the hooky thingy. Drats.