What’s the best flight controller for multicopters?
For simplicity and on full sized video quads the DJI NAZA is hard to beat. If you are building a mini then the Naze 32 or CCD3 are probably the best choice.
If you are looking for an open source board with all of the features of the DJI then APM is a great choice although it a little more complex to setup and tune. It’s capable of 6 different flight modes including fully autonomous flight programed with waypoints from your laptop or tablet. This will be the best choice if you are doing aerial mapping.
What do you want to do with your copter?
The most popular control board and of the easiest to use is the DJI NAZA Lite or NAZA V2. The lite version can control up to 6 motors and the full featured V2 can handle up to 8 motors. If you are building a multi copter for filming aerial video then this board with GPS will be your best option for sure.
Best mini racing quadcopter flight controller
If you are jumping into the fast flying racing mini h quads then a CCD3 or Naze 32 are going to be your best bet. These boards do not have GPS and the use the open pilot or clear pilot open source software for set up and tuning.
The multiwii boards are another great option especially if you are on a budget you can find the flip 1.5 board for around 20 bucks with a case. The first quad I built, the Flitetest Electrohub used the flip from ready to fly quads .com. It came with the software preloaded and all that was needed was to sync the transmitter to the board with the downloaded software.
This is another budget board that get’s the job done and is very popular among tricopter builders. If you don’t want to use a computer and prefer a stand alone board with LCD setup screen then the KK 2.15 with LCD is your best choice without having to use a PC or tablet to tune your copter.
Best FPV flight control board
This Eagle Tree Vector FPV Controller with Color OSD (on screen display) is designed to be setup and tuned through your FPV display screen or ground station monitor. It also has a very powerful PC software if you prefer this type of tuning. This is a high end more expensive option that can be used up fixed winged 3D aircraft as well. I think I am going to give this one a go pretty soon.