I don't have any experince with that group, but I've also contemplated joining them. But, since I live east of Buffalo, it would probably be quite a commute. I used to get together for tasting at niagara Traditions and I'm sure a lot of those folks are part of the group. All good people.
I have become quite the brewer thanks to the people at Niagara Traditions. I haven't joined the association, but am part of their mailing list (which lets you know when there will be deal days.) Nonetheless, I'm sure joining them would improve both your knowledge and skills in the trade.
I just moved back to WNY from Mid Michigan and am looking for homebrewers to connect with. We should all join the Niagara homebrewers association and get to know each other. I've found the more people to talk about home brewing with the better the experience.
I don't know the Niagara group, but I'm in the Sultans of Swig. We meet at Gene McCarthy's in the 1st ward (we were meeting downtown at the Century Grill but outgrew the space) on the third Monday of the month, and have a rotating social around the area on the first Monday of the month. There are some real good home brewers that will provide feedback on how to improve your beer. Typically everybody brings a few bottle to share and get evaluated. We also get into a few of the AHA club only competitions. Gene McCarthy's usually has 8 micro's on tap for before and after the meeting.