I have 2011 code on my DH bike. In fact I’ve had Avid brakes on all my bikes including elixr’s on my enduro and now the CODE’s on my TR450 having previously had elixr’s on it too.
Avid’s are not for everyone. Quite temperamental and 2 identical sets out the factory can be miles apart to start with. But after a good bleed, and if you don’t mind a bit of tlc and fettling, they work tremendous and the CODE’s in particular have just the right feel and power for me. In fact the new CODE’s have an abundance of power if that’s what you’re after.
I’d advise getting the basic CODE R’s as it’s generally the AVID levers with the adjustments like pad contact adjust that give the most problems in my experience.