I just got my elite catch can on. It took probably 30 minutes start to finish, pretty simple. I installed the can above the spare battery tray, I figured it would be easier to drain that way. I haven't driven it but did notice a hiss coming from the area while at idle. I will update after my first drain.
I changed mine this weekend and the next time I turned on the AC it had a horrible noise that got louder when I turned the fan up. Turns out a leave fell into the blower motor blades and was causing the noise. Used a little mirror and flash light and I was able to reach it and get it out. After than the noise went away and all was good.
Having the same problem as everyone else. 2014 LTZ with heated and cooled and it takes 30 minutes or so to feel any warmth and it never gets anywhere close to hot. Coming out of a 2004 LT3 and the heated seats worked GREAT! I got the same "working as design" line from my dealer when I brought it up.