Inter City Express
For seven years now, I've been commuting to work. Nothing really bad to say about the Dutch railways. Okay, trains are sometimes (quite) delayed and communication about those delays isn't always very good. On the other hand: the trains *do* run and they are quite comfortable and clean.
But to be honest: the Dutch trains don't compare to the German ICE's, the Inter City Express! The trains are very comfortable, very clean (even the toilets) and have a restaurant on board :-)