Where I live here in Sacramento California we have a strong Muslim community. And we also have one of the most praised Islamic schools in the US, Al-Arqam school. It is an IB (International Baccalaureate) school and from I understand it is either "one of the" or "is the" only Islamic school to be granted IB status.
We have about 7 masajid in our area, with a huge mix of people, with a large concentration being south Asian. The masjid I go to, Annur, is one of the best. We have several Halal markets, a MAS (Muslim Amerian Society) chapter... we do have one or two "progressive" Masajid that tend to be a bit more liberal than I personally care for, but for the most part we're mostly strictly Sunnah.
The cons? Well... there are some cons. Lets just say that our ummah - for all its great numbers - is just not very motivated unless free food is involved