When I was learning to fly, I had to make the decision whether to go for R22 or S300.
The S300 was a good 30% more expensive per flying hour (not rotor start to rotor stop) but I had also heard that there would be a good chance that I would pass in fewer hours - hence be just as cost effective in the long run!
Sounds like I made the right decision
However, I will never know whether it would have taken me longer to learn in a Robbo !!
Cheers
Whirlygig