Using it right now - it's... so reliable. Had zero problems. Love these zero-problem products in life (and they are not that easy to find to be honest)
I've had problems with my 2014, but at the same time it's repairable. The screen went a bit screwy, so I opened it and replaced the LVDS cable. Right back to ticking along.
Typing this on a 2012 rMBP that's still a champ.