I love my bumblebee. I got mine for 180 bucks, and it came with everything but the controller board. This project was meant as a poor man's multicopter, and the original bee board was out of budget...so, I got a KK2 for 29 bucks and I can't believe how stable it is. Now, I had to discard the original ESCs because they were ultra pwm and not compatible with the KK. The original ESCs fit nice and out of site at the end of the booms and the wires inside the boom. I got regular ESCs and they had to be mounted on the booms themselves.

With a 3s, 50% d/r on roll/pitch, -20 expo, it's scary stable. Now, you put a 4s and full rates and the thing screams. My only gripe is the CF skids...they are too fragile for skids and wish they were aluminum. I'm still getting used to orientation with these multicopters...seems to be the hardest part. Coming from flying helos for well over a decade these things need a canopy and a tail rotor to see which way they are going. I wish the front props where orange. Oh, and another thing that bites is that you have to use oem propellers because the prop hubs (part of the motor housing) are not circular. You are stuck buying oem propellers unles you somehow machine the hubs.