Are you running the stock brakes/pads? I had one scary experience with them, almost crashing into someone at the end of a long descent. Coming down Conzelman Road in the Marin Headlands (SF Bay Area), I was almost at the bottom, near the turn-out for the parking lot and to get back onto the Golden Gate Bridge, and a rider going the same way suddenly decided to cut across the road and head back up, without looking behind her.

I had the brakes fully clamped down but they'd apparently faded pretty badly so weren't stopping me as much as they were slowing me down. Luckily for us both, she heard me yelling at her as she started her blind U-turn, and stuck to the far right of the road as I rolled past her. They slowed me down enough that a crash wouldn't have been catastrophic, but it would've been some sort of unpleasant.

Anyway...be careful with the stock brakeset if you're in a situation where they'll be prone to fade. Whether or not you've got a sweet electric assist rig or not...