I think most people are using liveboxbreaks.net at the moment.
pros - breaks almost daily and can ship to AUS free every month. Can be watched live
cons - timing of listings to purchase teams (if you have a favourite team you collect) obviously everything based on US times so teams are listed late at night or overnight so you could miss out. Also, he doesn't ship any base cards only hits and inserts so you can go cardless for quite a lot of the breaks
Apart from that i don't think anybody has had any major issues and everybody has received their stuff. There is a dedicated link in the NFL box breaks forum if you need to have a look