I was staying at the Mercure for one night in July 2010 with my wife. Overall, we didn't have so much to complain about, the Mercure Hameln is offering what you would expect from a Mercure hotel: clean and comfortable rooms. Nevertheless, we were in Hameln during the heat-period, with around 35°C temperatures. I was assuming that a Mercure would offer an A/C system, but unfortunately I was wrong. It was certainly 4-5 degrees hotter in our room than outside, really sticky thus! Although we left the door to our terrace open all night, we didn't have the feeling it would get fresher in our room. Consequently, we absolutely didn't sleep at night...
Apart from this, the usual problems with Accor hotels: every service costs extra: 16 € per person for breakfast (which is really exagerated!), internet etc. If you already pay near to 100 € for a standard double room, which I find a lot for a small city in the middle of nowhere, I would at least expect the breakfast to be included (or at a reasonnable price).
The location is ideal: very quiet, near to the theatre and a nice park and just 5 minutes walking to the historical centre.
If the wheather would have been "normal" in Hameln, our stay would have been ok. But due to the absence of an A/C, our stay was rather uncomfortable...

Wonderful place for a trip to Hameln - the staff were helpful & courteous. The room was amazing - everything previous reviewers have commented on - balcony overlooking the city, our family room was actually a suite which was fantastic! Wonderful breakfasts! huge pool, great changing area - obviously shared with residents but so large that there was no problem with us and the 4 or 5 residents using it! Thoroughly enjoyable stay.

The hotel is located at a centrally located place near the famous Piedpiper fairy tale enacting place.The breakfast is good and for a vegerarian you get a very good breakfast even everything else is also there.
my jet privelege card no is 100859544

I stayed at the Mercure Hotel in Hameln for 2 nights. They offered an impressive breakfast buffet with freshly made gateaus and flans, a nice selection of hot and cold dishes and beverages. Complimentary bathrobe and access to an indoor swimming pool which is huge. It is located in an annex, quite some steps from the main building, open until about 10pm and if you go there after sunset it can get a bit spooky (a common problem of many spa or pool areas in hotels, as here: often a bit isolated, cool and gloomy, especially if you are alone)! Good location, only a few hundred meters from the centre of the old town.