Amazing running shoes. This is now my 5 consecutive pair of Nimbus. First three pairs of the 14s, then the 15s, and now the 16s. Not a huge difference between the model numbers - just a consistently great running shoes. Don't skimp and buy a cheap pair. If you're here, this is the shoe you're looking for. Though, if you can find a recent model number for less money, go for it! The 14s, 15s, and 16s are all 5 star shoes!