OK, I have one nobody mentioned so far. IT's a DRITZ and I love it. It has no smell; heals well; and so far has given me no problems. I have had it about 18-24 months now.
I bought an OLFA and let it air out for about 10 days; I brought in the house and layed my fabric on top; I then had to let the fabric air out for 24 hours since it smelled like rubber.
Olfa is a wonderful product but when I returned it to Joann's the girl said and I quote: What is that smell???
I have a smaller one that is a Fiskar and no problems with that but I would never buy another Olfa.