I'm a firm believer in the old saying "you get what you pay for" having flown the R44 for many years and EC120 now for a while, I can imagine the R66 as just a bigger R44 with a turbine engine.
Yes the figures look good for the 66 and value for money wise, if it was my coin I would probably purchase one if I had to based on the dollar value.
However I can certainly appreciate the 120 for it's (Im my opinion) superior build quality and sturdiness, I kind of liken it the difference between a BMW 3 series and a Nissan Pulsar or the like, they may look similar on paper in terms of what they can do but there is a big difference between the two as most people can appreciate.