DorsetBoy - don't mind the cynics. It is a good thing when an organisation - any organisation - makes it easier to find dive buddies. And if you do so through a site that's likely to attract people who are interested in following through on the sport they're more likely (IMHO) to make good and safe buddies.
Training organisations are all very much alike - their reputations depend more on those who represent them and reflect their real values than anything else.
For my money (someone's bound to comment on that expression) PADI's 'system' - correctly applied by well motivated dive training professionals is the equal of arrangements provided by any other organisation - and it merits your loyalty and support.
Amen Mr. Newman, and tks.