I was somewhat disappointed that there was not a world of difference between CAS-2 and CAS-3, however, it is clearly better than the CAS-3 stuff.  The price difference between cheap, no name PC-133 modules, and these Infineon's is only $8 CDN ($5.40 USD) so if you are going to be getting a new computer anytime soon, I would highly recommend going with the Infineon PC-133 modules. 

I wouldn't recommend doing something drastic like, selling your current PC-133 RAM (at a huge loss), and going out and purchasing these Infineon's or any other brand of CAS-2 memory.  Ultimately, if you can not get the really expensive RAM, then try to seek out these Infineon's at your local retailer, I mean come on, if we can get these in TORONTO, then I'm sure that they are not too difficult to locate.  And for an $8 premium, I would highly recommend spending a bit more on some quality PC-133 RAM, like these Infineon's.

Btw, props goes out to anyone that can recognize that warranty sticker on the RAM pictured up top, then you'd know where I have to work :(