The Nate P basses are in my opinion the best P bass for the money. However, some of the ones I have had ( Ive owned 10 or so ) have had the same issues as well as the earlier ones ( Badass Bridge) having bowing neck issues, not all of them but certainly a few I have had. The later ones I think have extra rods in the neck to prevent this. Regarding the fret ends, the one I have in atm definitely needed a fret dress and the ends tidied as it wasn't great. It was second hand and 4 years old. I believe the Mexican stuff is very very good, although there are a number of 'Friday Afternoon' ones kicking about. A flea jazz I had was terrible, completely wired up wrong and needed considerable fettling before it was a good-un.