The Rotorway Exec is a great helicopter...the series, 'A Chopper is Born' included a very detailed look at the manufacturing facility, which was very impressive.
I have a lot of helicopter time, have been a maintenance officer at both the detachment and squadron level and also spent three years at the Sikosrdky factory in CT. as the Chief Test Pilot where I got very invovled with the maunfacturing and production process.
In addition, one of the projects I am currently managing is 'unmanning' a manned helicopter, a Switzer 333/335 hybrid. The aircraft is manufactured in NY and the avionics are integrated in Miss. Again, I have been to the factory numerous times and have detailed knowledge of the fit and finish of the helo.
Given all that, I would not hesitate to build and fly a Rotorway. I would put the manufacturing element on par with Sikorsky and Switzer.
Thw only reason I won't build one is because I am going to build an RV8 kit plane...I want to get my fixed wing time up to my helicopter time