I had a look at a few Hilfiger watches recently, they look to be of passable quality, but they are certainly not expensive watches,
most of the money is for the brand name... I doubt you'll find a Hilfiger authorised repair shop. Just go to any bog standard Helsinki kelloseppä (I'm surprised nobody one here has recommended one yet)... so search google ... kelloseppä + helsinki
Quality wise, you'd be better off investing in a Casio MTD series diver's watch, you'll pay half the price of the Hilfiger equivalent mine took 9 years of beatings before I retired it (still working) and replaced it with another.
Tip ... don't buy it in Finland, it will cost you upwards of €120 - €150. They can be found on the UK version of Ebay and shipped from England for about €60
http://search.ebay.co.uk/casio-mtd_W0QQ ... asioQ20mtd