Right now is a great time to score a 2015 model. Doesn't make sense to buy a new MacBook Pro until a 32 GB option is available imho.
Feel very comfortable with the decision.
Ultimately the 2016 MBP is a "V1" new product, which I think most of us are trained to allow some maturation before jumping on board.
It should be mature enough in 3-5 years when I'm looking to replace my 2015 MBP!