I have to go with
arismount on this one and say it ain't all that easy when it sneaks up on you (from 500', you maybe have 15-20 seconds until you're on the ground, one way or another).
I've had the great good fortune to do literally hundreds of touchdown autos in the 206 and the 407, and after a while, one can get pretty good at them (as the instructor from Bell said: "a week of non-stop autos, your grandmother could do them").
However, as
arismount astutely points out, it is rare indeed to do one to touchdown in a twin (I
never have, in several thousand hours in twins, the bulk of my time), except in a simulator (where the time to pull is only a guess anyway and the consequences of error are minimal) and whenever I have done any auto in any machine (or a simulated engine failure at altitude to be terminated well before landing) it was over a tended field or paved surface (not over trees or the like). In short, planned, by someone (be it myself or an instructor). If you have to put it down in woodland, your last 50 or so feet might be vertical, hoping to avert rotor impact with the trees. That whole tree/rotor interface can break your neck, the loss of wind effect below the treetops may kill your lift and you fall at 32.2ft/s2 (9.81m/s2 in Europe) and hope it comes out alright.
In the end, (and I may not be right), in a single, I scrupulously minimize the amount of time I spend over places where I can't safely auto to a controlled touchdown and when it can't be avoided, I'm nervous as a long-tailed cat in a room full of rocking chairs while I'm there.
But, even with all that, I'd rather deadstick a helicopter to the ground than an airplane, but that's just me.