i have 60 hrs now on my 600 i find it to be marvellous .i dont realy have a problem . All helicopters have something that bites if you dont watch it ,but on inital training you are taught to be able to recognize these and you make sure that you do not get into these areas
the ysas mods will lighten the in flight workload i flew the 600 in usa with the ysas it was spot on