I didn’t ever speak to a staff person; the line was long when I checked in, so I used the computers. And there was no one to be found during my attempt to check out. This wouldn’t have been a problem, except that it made for a confusing time finding the airport shuttle pickup spot.
My biggest reason for giving a 3 is that the airport shuttles are too infrequent to really count as a convenient solution. I booked this hotel because it advertised itself as convenient to the Frankfurt airport. Yet, arriving in the evening, I had to wait in the cold for 45 minutes before the shuttle bus arrived, particularly since I was afraid I’d miss it (not knowing what it looked like among many other shuttles). But the astonishingly crowded morning shuttle was the very worst. It was so overcrowded with people and luggage that we had to make precarious stacks of slippery suitcases, just to carve out standing room. Some of this was inconsiderate fellow-passengers refusing to move their stuff, but almost all of this could have been mitigated if the shuttles came every 1/2 hour rather than every hour.
The breakfast was okay—very basic—and the room was clean and comfortable.