yes helimark the 600 does have a interesting tuck ,but when you know when it can happen it does not cause a problem
as a owner and a pilot of a md 600 i make the following comments
power
i find the 600 has more than enough power in all modes of flight i dont think i have ever run out of power in a pedal turn
safety
safer for passengers also when flying tail rotor helis landing in private sites i dont get that suck up hairs on the back of my neck with the 600 [any body approaching from the rear is not going to walk into the t/r. ]
fun
i find the 600 a joy to fly fast, responsive,pure grunt power.
cost to run
not bad either
ysas
now there is a thing the 600 does not have a ysas like the 520 but there is a retro fit mine is being done 29/7
apparntly it will let me lift off without pedals ,land without pedals , and make autos easier ,
any way i like the 600 but there is one helicopter i would like more than the 600 and that is a 900 but now i am dreaming
i test flew one a couple of months ago it was pure sex.[i also had a go in a 135 it was not a patch on the 900
regards all