I have started using the titanium replacement blades because they seem to last longer than the regular blades. They are a tad higher in price initially but since I don't buy them as often, I save money. Shipping is great and the prices more than reasonable.
Will be making wedding invitations next week for my daughters wedding. Don't anticipate having to change blades to get a clean cut.
These are the best replacement blades I have ever used. I use them to cut scrapbook paper and you can cut several pieces at a time. Great price great product.