I have the Classic and used to use it much more in my rotation. I recently tried it again and was not pleased. It seemd like it just was not cutting properly, and I had to do many more passes than usual.
I think it may have been the cartridge I was using. I'll have to do some experimenting again.
I'm buying Personna blades Auto plus which are a compatible Atra blades... you can get them on ebay for 18$ for 100 blades.... or even 500 for something like 65$ They feel exactly like regular Gillette Atra blade.