I got my invite on like day 2. I was having a blast with it up until recently. My "teammates" have made leveling up the primary goal with no regard to anyone else involved. The BEST advice I can give anyone playing or waiting to play is to organize your local group quickly.
Working for weeks to level up portals only to have them rendered useless by another players field SUCKS.
Start a collaborative Google map, work together, plan your fields to maximize coverage.