Using 22' RotorHawks without a pre-rotator. They work really well, pat up easily. Very smooth with very little rotor shake. Keeping them spun up is not difficult even with a 12-14 knot tailwind.
They will announce incipient blade sail clearly with a side to side twitch of the stick and instant stick forward nips blade stall in the bud. They happily lift my 90Kg and accelerate to 60Kts with ease.
I consider myself fortunate to be in training on rotor handling on these mild mannered blades and am looking forward to seeing how our slightly more temperamental but lighter, and, hopefully better performing DW's handle.