we are using an old Chadwick for the AS350 and a RADS AT for the Bell 214B. I call it RATS because I think its a bit complicated to use compared to the Chadwick.
Average time for a 350 is 3 ground runs, a 5-10 min flight all taking less than an hour. But of course it may take longer if you get into trouble.
The 214 is another matter. The blades (tabs) are VERY sensitive and we have been using 1 and a half day including 1,5 hours airborne time before becoming satisfied. And the 214 has only two blades thank god.
And we always go for minimum vibration at the expence of blade track. Within reason of course.
We are considering buying a Microvib II which is a new magic box using a camera instead of a strobe and also has no software but is a "self-learning" thing. We will have it demonstrated on the 214 at the end of this month so if that works out OK its a deal. Another thing with the Microvib is that it is possible to connect weight cells to the box and use it for weighing.