My review is based on PS2 usage:
Don't waste your money on the cheap PS2/PS3 component cables if you want perfect output from your PS2, they may be fine when just gaming at the standard resolutions, but when you come to play anything that supports Progressive Scan (480i) you'll more than likely find that the cheap cables just aren't up to the job, producing ghosting and colour distortions.
These official Sony cables give a vibrant and crystal clear picture on my PS2, and are very well constructed.
So, if you want to get the most out of probably the best console of all time, you need these cables. If you're switching from the standard SCART combo, then the difference is night and day.