I bought my first servo stabilizer (2kva) from Vertex in 2007. Then I bought another (1kva) in 2008, and recently (couple of years ago), I bought a 3 kva unit. Couple of weeks ago, I wanted them to check out my older units as they were quite old, and I was not sure they were in optimum calibration. I e-mailed Issac Yesuratnam (their Hyderabad Tech./contact) on a Sunday and he replied back immediately. Pleasantly surprised at such prompt response I mentioned the need for service/inspection of both my units. These weigh 10-15 kg each, so I was dreading that I would have to carry them to his location. He replied that it was not necessary and he would come to my place. He showed up 3 days later at the exact appointment time and spent about 1.5 hours checking out/calibrating the units, and replacing some parts/components in 1 of my unit (not damaged but upon a request I made to improve convenience). They are in perfect condition now I am very happy with Issac's promptness in responding to my needs and very happy that Vertex is standing behind their products, when so many so called high end dealers/distributors don't even bother to return e-mails or phone calls even.
Cheers,
Sid
Cheers,
Sid