Roberta Zollner wrote:

I use both and haven't noticed much difference. IMO the Fiskars is easier to
hold, but this is something you just have to try out for yourself.
Lots of the trouble with dull blades comes from allowing the screw to get
too loose so the blade wobbles a little bit. This will make it dull faster.
Also, you need to practice holding the cutter so the blade stays
perpendicular. If you cut at an angle, it's the same as a wobbly blade, and
it's also a safety risk. Keep the cutter clean -dust out the lint now and
then. Don't use your fabric blade on paper, and only use it on a cutting
mat. (I have a handle in a different color and save old blades for cutting
paper.)
And remember that blades simply do not last forever. Would you expect a
razor blade to remain sharp forever? It is not fair to blame the cutter
handle for the normal lifespan of a blade. I never really timed a blade, but
mine seem to last about half a year. And I cut a lot.
Roberta in D

Half a year... well, to me that's a long time. More than enough. I
saw a page online where they sold blades in bulk, 500 pieces. That's
enough to last several lifetimes, even if I'm very clumsy with the cutter.