(Disclaimer: I sell a competing product)
Although I'm not familiar with this particular product, products from 'similar' manufacturers that I have dealt with have about 1500-1600 hours on them with no failures. The engines are actually copies of Yanmar engines, I've sold them by the dozens, no reported failures so far.... I've also had no issue with the Honda copies from this (my) manufacturer. The alternators that have been provided to me have been of good quality, and reliable. This appears as though it's from a different supplier, so no guarantees about how it lasts, as the chinese quality varies just as much as the Indian quality. There is some junk, and there is good stuff as well.
With all that said, my manufacturer rates the exact same unit at a 4800watt continuous rating for the 120/240 volt, and 200watts of DC power. (100 watts which charges the starting battery, and 100 watts available at terminals on the font panel.)
If you dont care if it has a sound proof enclosure or not, the same unit with an open frame can be had for a cost closer to $700.
Steve