To be honest, I think that whilst in some places the sound in the park is really well done, (I'm talking about mostly direction wise, as in if you can tell where the sound's coming from or not and whether you should be able to), such as Terror of The Towers, Air's station, the Extraordinary toilet's glooping bog sound effect, and Duel. (You know the EEEEAAAIRRGH bit, I think it's really clever how it sounds like it's following you and in the station with the voices.)
However, in some places like Towers Street and Katanga Canyon, it's crap. Sound based in only one or two places, no coverage whatsoever.
It's hit and miss.
*waits for anti-Bose comments* ;)
Adjective: Fat, round, or bulging.