It's a total mess. Not only did they do zero bugfixing because "we're talking 10 years old code here", but they also managed to create new ones. Tiberian Dawn suffers from a showstopper around which a fan-made solution appeared only recently (haven't tested it yet so I can't assure it works), and the music tracks from the expansion are missing. Same goes for RA, and that one has the Soviet FMVs missing. Those are bugs everyone is encountering. Everyone. There seem to be problems with the launcher asking for the DVD, even when it's already in... etc.
My advice, steal it.
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I'd heard about the Soviet FMV's not appearing but haven't had the oppourtunity to test it yet. Haven't tried Tiberian Dawn yet either. What showstopper is in that one?
As a matter of fact, the old Westwood Chat system and TS/RA2 multiplayer lobbies are now managed by the community. There are patches and detailed guides to make both Tiberian Dawn and RA1's multiplayer modes work, and quite simply, to boot. Of course, EA's involvement in this is reduced to allowing the community to manage the lobbies.
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Ah, good to know.