Having read some of the hyperbolic comments from users when it first came out it's a wonder how it ever survived it's early critics..
My guess is if you treat the neoair using common sense backpacking 101 then there is nothing to worry about. Besides if somehow a leak does occur you have a repair kit to patch it up tight. I have used mine maybe 4 times and always use a vapor barrier between it and the tent floor.
Always pack and unpack mine inside the confines of my tent.
I bought the womens NeoAirX-lite which has a higher R value (3.9) than the mens pad and also has a weight savings of a few oz. It should serve you well on your PCT hike.