I think the general idea is that you should always buy paper that is the same brand as your printer. I think printer manufacturers "optimise" their paper to work best with their own printers. So, once I had bought my Canon inkjet printer I had no choice but to buy this paper.
The results were very impressive, and I would highly recommend this paper if you have a canon printer.
I also tried my printer with some Kodak Premium Photo Gloss paper which I picked up in a sale in WHSmith. This Canon paper gave far better results.