I love my Olfas but my 28mm one kept falling apart when I used it. It was so weird, the nut and washer would fall off one side and the blade and round screw thing would fall off the other side. It didnt feel like the screw was stripped but it sure wasnt useable. I emailed " World Kitchen"which is Olfa. I never heard a word back. I then received a new one in the mail after 6 or 7 weeks. I am happy that they stand behind their product but it would have been nice to have my message acknowledged so i knew what the staus was. I had a problem with a Fiskars cutter and they let me know that it would be replaced. I was a lot happier knowing right away what the outcome would be.
I think its great that these 3 companies warranty their products to our satisfaction. I think it makes great business sense- i think they make more money on replacement blades than the cutters anyway-LOL