Mondorf Parc Hotel - Mondorf-les-Bains, Luxembourg 

The big bonus to staying in the Domaine Thermal hotels is free access to the thermal pools and spa facilities. Based on the brochure offered by the spa, I did not think the spa treatments, compared to other spas I've visited, were overpriced, and though I did not get to try any of the treatments since our time at Mondorf-les-Bains was limited to one night and the following morning, I would really like to try a spa/hotel package the next time my husband and I visit. The hotel staff were very helpful in finding us an excellent babysitter for the evening of our stay, and the thermal pool facilites are great! We had a fantastic time swimming, hot-tubbing, etc. there. We also dined at an Italian restaurant just steps from the hotel (the hotel's restaurants all close at 9:30 p.m., which would be my one complaint; I wish they kept at least one of them open 'til 10:30 or 11 p.m., since the thermal baths close at 10 p.m.), and it was very good. Regarding our hotel room, it was sizable and the bed and bedding were very comfortable. We were able to have our small dog stay with us, and there was plenty of room for our baby's cot (in fact, our room had a sort-of antechamber where she was able to sleep, which made staying at this hotel all the more comfortable). The town of Mondorf-les-Bains is small, very clean, and charmingly historical. I was sorry we did not make it to the casino, but will relate that the Domaine Thermal hotel offers a coupon for free admission to, and a free cocktail at, the casino (at least they were doing so during our stay, keeping in mind, however, that we were there mid-week). I definitely recommend both the Domaine Thermal hotels and a trip to Mondorf-les-Bains in general!