Yes, this property is known as the European Quarter Marriott Executive Apartments and is right next door to the Renaissance. I stayed here for the weekend about a month ago. We negotiated a rate of 99 euros per night including full breakfast and use of the extensive gym facilities of the Renaissance.

The apartments, in a separate building, are accessed through a very small lobby with a small lounge - no staff, excellent security. There is a living room with fold out sofa bed, a small kitchen, a WC in the entry, and a bedroom with full bath. Our floor had small balconies off the living rooms. The apartments are well appointed: large desk, two TVs, stereo system, etc. I found it to be a very good value for the money, though a bit impersonal (very business oriented).

The staff at the Renaissance were quite helpful, the breakfasts were very good, the common areas are nice. The neighborhood is very quiet on the weekends and it is a bit further from the center than some other properties. We took taxis or the bus or walked everywhere we wanted to go.

http://www.execapartments.com/BRUER/