[quote name='xycury']
It's future proof, works in Windows 7 and Vista. No messing with DosBox because GoG does it for you.
[/QUOTE]
GOG works on Vista, but GOG is *not supported* in Windows 7.
The games may work, they may not, however GOG does not have official support if it does not work in 7. Meaning, if it doesn't work, you're either a) screwed or b) scouring GOG's forums for someone there to offer a fix. They are currently working on supporting Windows 7, however. For instance, GOG's new release, Betrayal at Krondor, already has problems on Windows 7 that are not happening on XP / Vista.