For the price we payed(89€ for 2 people, 2 days incl. breakfast)this hotel is ok. The rooms are not the bigest, and so are the beds(queen) and bathrooms, but it has everything you need. The staff is friendly and very helpfull, the breakfast-buffet is great! There's a McDonalds next to the hotel. The Highway is around the corner, but there's no noise. A perfect spot to visit the very nice town of Dordrecht. Amsterdam is just 1 hour away, by car. Rotterdam 20 minutes.
Book through their website, they might have some great packages.
http://www.accorhotels.com/nl/hotel-2106-mercure-hotel-dordrecht/index.shtml
We would come back here, for sure!!