Recently used Microvib 2 for the first time on a Bell 212.
Lateral and vertical less than 0.1 after three flights following Hub change. I had the advantage of some advice from an experienced mate prior to using but overall was very impressed with the kit and its capability.
Optical tracker not strobe.. Both options are available if you buy the kit go for optical.
Only criticism is user interface not so friendly but overall excellent equipment once you iron out the kinks.
Will see how it goes on a MD500 soon.