I arrived late-ish on the Sunday, but two staff were on-hand to let me in, show me to my room and help with wi-fi and some ideas for local restaurants.
The next morning, the restaurant manager also gave me loads of tips on places to go jogging locally and bus information into the local town (Ingelheim) so that I wasn't late for my meeting.
Schwabenhaim itself is a charming little German town with a few restaurants and a nice pub, spotlessly clean and offering good bus routes into the local Rhine Valley area
Hotel Stadt Mainz is a great base from which to enjoy this for about 30% of the cost of a Frankfurt or Mainz Hotel!