I've never had any problems with Millenium. They limit teasers to 1k per bet, and if you win, they'll request that you call in all your plays.
They have good teaser odds (+100 for 2-team 6 pointers), but they treat a "push-loss" as a total loss, whereas most Vegas books treat that as a push. Also, they might try to treat a "no action" as a push (when the preseason games didn't finish). If you are looking for a teaser shop, Canbet is the best (+100, and Vegas rules for pushes).
Millenium is part of the "RIO/SKYBOOK" family. I've never had any problems making withdrawals. Stick to Neteller, and don't wait to the end of football season, and you shouldn't have any problem.