Not sure I would be classifying this hotel as a business hotel. Internet never worked, no mini fridge, no coffee or tea making amenities, 15 minute walk to the train station, $30.00 Euro return by cab to Marienplatz if you want something decent to it.
Access to Messe isn't that convenient as you need to catch the bus which comes every 20 min or spend more money using a cab. Messe in its name is very misleading.