John Uptigrove is the developer of the Mosquito. He is a 'no nonsense', 'no 'bull****' type of person. He has been developing and improving this helicopter for a long time. IMHO, his craft may restore some confidence in the mechanical reliability of ultra light helicopters that was lost during the era of the Mini 500.
One argument that can be made for a simple helicopter is that fewer parts should result in fewer breakdowns. An overworked engine will always represent a problem and John has gone through a number of different engines attempting to find the best.
Of course, poor assembly, poor maintenance, or poor piloting can break-up the best of craft.