They are what we call a boutique helicopter. Very beautiful to look at, but not very practical, as spare parts are very hard to get. In the US they aren't very well known, but in the UK they have quite a following.
Was thinking about getting one, only because an Aussie had a fair bit of input into the design. Very unusual servo to swash design. Apparently they can go over 200 kph and parts seem to be readily available here.
IF you can get the bits ... go for it ! they are a Beast! ..... I have seen one flying here .... good for 200KM/h ..... $5 grand worth of heli ... he was saying it had a 10Kw motor in it!!!! it was certainly impressive
Done a bit more research. Had a look at the instruction manual, man!! What a complicated build. I think I will give it a miss it is for someone far more advanced than me. Lol