SnusCentral has been my only supplier for close to 2 years now. Absolutely no problems with any of my orders. Cheapest prices on the web, not counting specials and shipping (Blame shipping costs on the US Gov/PACT Act.).
I have seen very few complaints about the service, less than other web shops.
Of course, in the interest of full disclosure I pen a few articles for SnusCentral.org, so I may have a bit of a bias.