Likewise I found the Fiskar punches worked well for the first several hundred petals, but they also loose their sharp edge and then start making fussy edge petals, which aren't great for making flowers. I made about 60 hyacinths, and each one used a dozen star shaped petals, and the punch would not punch crisp star shapes any more, so that means it worked for about 700 punches. Maybe that sounds like a lot for a $10-15 punch, but I had hoped for more use than this.
I made the same amount of tulips using the Martha Stewart tear drop shaped punch, and it is still working beautiful. I went to Michaels this weekend to see if they had a Martha Stewart star shaped punch, but they didn't have one. I'll have to check other Michael's stores when I am travelling to see if one exists.
I would love to hear from other flower makers to see what brand of punches they use and what works best for you. I still have lots of flowers to make, so any good advice is greatly appreciated!
-Wanda