The PS2 version plays really nice imo, more like PES6 or 5.
Be warned though the BAL mode is not like the PS3 version.
It is simply the Fantasista mode, although I have only played about half a season, I don't think you can be called up to the national team (but like I said I have only played a half a season, just that I have not seen anything that indicates national teams so it may be possible???)
It plays nice so far though which is important I guess although I've really on played BAL and a few matches on exhibition (no Champions League mode)
No LeagueC for the Bundesliga so you'll have to overwrite teams for that.