Typical Rockstar game.
Utterly broken Multiplayer, jittery animations, horiffic pop in/ draw in, horsemen screaming past at 200 MPH, animals appearing and disappearing on the spot, impossible mission objectives, broken/ unfinishable missions, cheap unfair ambushes and animal attacks, NPC's dying for no reason, laggy gunplay, awful sticky cover system.
*Breath* Dung coloured de-saturated environments make finding and collecting kills a drag, horse riding can be annoying (I somehow accidently shot mine dead twice while hunting), horse AI is stupid.

On the plus side the Dead Eye system works well enough, the environments are interesting if bland and lacking contrast, the voice acting and script are incredible, great music. Hunting is fantastic fun, plenty of challenges, realistic animal behaviour, nailing a pack of coyotes in Dead Eye..at night...from horseback...very cool.
I'd say it's a keeper if they fix the MP because that's the area with the most potential, I managed to connect to one free roam session for about ten minutes last night and "Had myself a time". Naturally everyone just runs about blasting the crap out of each other instead of "socialising" but the potential for Super Fun! is definitely there.