Advena will provide wide space in thier rental appartment, but you have to take care of cleanings yourself. What i like is that you can have your own kitchenet in your room..thats great!

I spent 4 weeks at the Advena Hotel in January of 2007.
I changed a few rooms throughout my stay, and not once have I found a clean room. Some rooms were so small that I could reach the bathroom door from my bed. The carpets were never vacuumed, and I dreaded dropping something on the floor.
Breakfast was quite good, but my company booked half-board for the entire lenght of my stay, and the food at the bistro downstair was awful.
The reception was rude and did not like our presence as guests (there were 8 of us). I had to fight with the hotel manager b/c they assigned me a room whose varnish paint smell was nauseating.
She did not want to change my room.
It's an OK hotel if you are there only for 2-3 nights, but for a long stay in definitely unbearable. Our company rescinded the contract with them soon after that. THANKFULLY!!!

Chose this place due to its close proximity to the city's Main Train Station ("Hauptbahnhof"). It is just a couple blocks from there, but the area is surprisingly quiet. Rooms were clean; with TV, double beds, private WC and shower, and excellent breakfast buffet included in the 99E price. An Internet cafe was across the road. Reservation was made through Germany-Bookings.Com with no problems. Staff was professional and courteous.

The Old City is a fifteen minute walk, and the riverfront is thirty minutes. It was difficult for me to figure out the public transit from here to the river, but I was able to do so (if you want to get to the K-D Dock, take the #60 bus).

The staff at this hotel were all friendly and welcoming throughout my stay. The woman who checked me in remembered me and greeted me by name several times when I passed through the lobby. The hotel served breakfast but no other meals, and the breakfast was varied and delicious -- good breads, cheeses, fruit salad, sometimes boiled eggs, cereal, milk, juice and good European coffee. My room was small but adequately furnished and always clean. The bells from a church a block or so away were a pleasant reminder of location. The building is fairly new and a typical Mercure chain hotel, but it always had a warm sense of location and personality in the very old city. Unfortunately, it is a bit of a walk from there to the tourist attractions such as the cathedral, but the walk is pleasant. The hotel is a very short walk to the main Mainz train station, a great convenience.