In terms of quality of their products they are one of the best of the industry. In my opinion GTA V was their best game this gen, then IV then RDR. Each of these 3 games though have been a massive crowning glory. GTA IV was imense when it released, for the time it came out, 2008, it was immense. and the story was amazing, long but no fat to be trimmed, unlike SA's story. Then we had RDR, imo not as good as IV but that's just an opinion. That jsut had so many things in the game, so much to do and see it really was something else. Then GTA V. GTA V is the pinnacle of gaming up ther with Skyrim in my opinion as what perfect games should be.
However R* suck at online, they have been getting progressively worse. GTA IV had crashes on the first few weeks, level resets then eveything was hunky dory. We all know about the GTA V crashes but I am not talking about them, the design decisions they made with RDR online and GTA Online were just horrible. They push this idea of crews but you can't add friends to a game you are not hosting, also no posse system like RDR so friends can follow you into games, But sometimes it just sends invites out to everyone on your friends list, no way to control it as far as I could see. Stupid convoluted way of muting people, should be in the phone, not pause. Quite a few poor design decisions with GTA Online, RDR Online had a few too, and also reset the levels of anyone who patched their game past a certain date which is F*CKING RETARDED!
R* have got steadily worse at online, probably trying too hard, it was close to perfect in IV, the only issues were trolls, griefers and hackers, but with a bigger map they were not gonna be much of a problem in free roam.