Fairly low. You'll find a lot of kids who work hard, as is the case with most junior leagues, but the majority of players in this league lack much skill. Definitely below USPHL Premier, USPHL Elite, and the EHL in terms of how it stacks up against other leagues in new england.
Interesting turn of events with the NSHL becoming the NA3EHL and entering the NAHL family.
The NSHL carved a nice little niche out in New England and producing a growing number of NCAA DIII talent.
Joining the AAU's mess was a mistake but the NSHL seemed to correct that by leaving shortly after joining. Personally nothing wrong with a true independent hockey league that's organized and run well.
I think there's some positives and negative with joining the NAHL family. One big benefit is opening it up to recruiting circles in the Midwest were there are other NCAA DIII schools and high end ACHA DI schools that don't focus on New England as much as the USHL, NAHL, and NA3HL.