I’am new to UAV quadcopters. I’ve been using a simple quadcopter with a KK2.1.5 flight controller quite successfully. I’am currently building a fully autonomous UAV quadcopter. I’am trying to decide on a full function flight controller, namely the Lynxmotion Quadrino Nano vs PixHawk.
I’am looking for a flight controller that meets the following parameters:
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clear, concise easy to understand instructions,
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most suitable for a multi-function camera platform,
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simplest to use,
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most flexibility for future expansion,
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simplest hardware & firmware set-up,
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easiest to understand software,
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basically the most economical full function flight controller for a beginner.
 
I would appreciate any comments that may help me to decide which full function flight controller to buy.