Hi Martin,  At my terminal we had two quay-cranes delivered last year with merford ergo-cabs, ie seat suspended from the roof, small control consoles on the fully adjustable arm rest and large glass floor areas.  My experience with merford presales and postsales support has been positive.  Both maintenance and operator adjustment documentation supplied for the cabin is also first rate.

In answer to your questions;

vibration of the cabin is very dependant on mounting.  Personally the merford sales engineer and I had many difficulities with our QC manufacturer to get the mounting right.  Once the mouting was correct the vibration experienced in the cabin is very low.

Quality, you get what you pay for.  We are happy with the resulting product even though there was a small price premium.

Comfortability, merford have put a lot of development into their ergo-cab product.  On paper this product looks very good, I am sure merford have product information available if you reqeust it.    We have now had merford ergo-cabs at our terminal for approx 15 months, we have been tracking injury data for our new cabs vs our old cabs and have noticed a definately lower injury frequency rate with the ergo-cab.