currently, i am running cognition 4. any tips on what i should do before flashing ff3, other than the normal flashing steps?
Other then disabling Voodoo Lag Fix, you should have no issues of flashing under cwm over to ff3 *just make sure you back up with TiBu and when you restore, just do apps with data and skip system data as that will cause a ton of FC all the time.
so far firefly 3.0 has been great. gps works like it has its own satellite, and the battery life is doing great. i have spent about 4 hrs on my phone trying to get back apps that didn't save right on my tibu backup and i still have +50% life left. i also used the gps for a few minutes too. the speed is lightning fast as well. great rom!