I bought a pair of the NB 501 trail runners this past summer and I love-love-love them! They fit great from the first time I wore them. My feet are a bit on the wide side, so I know NB is my best bet for a good fitting shoe.
These shoe are the 510 style - seem to be a bit wider than the 501's and I that's fine. The tongue of the shoe seems a bit short. If I lace them up through all slots, the laces come up further than the tongue.
Other than that - I'll wear 'em out as fast as I can!