My husband and I were looking for a moderately priced hotel where we could get some work done while visiting family in Tuebingen, and the Katharina Garni fit the bill perfectly. The superior double room we stayed in for about two weeks was large and comfortably (if not particularly elegantly) furnished, the bathroom was clean and modern; and the breakfast spread was pretty good, especially the delicious German cold cuts and rolls.
Best of all, the high-speed internet access (via a wired router) was free and pretty reliable, a major consideration for us. Note, however, that unlike most hotels with in-room ethernet, the Katharina Garni does not support Wi-Fi travel routers so for both of us to be online at the same time, I had to set up Internet connection sharing on my notebook, which is a bit complicated. Also, if you want to sit at the desk, consider bringing a 10- to 15-foot ethernet cable as the supplied one can't reach that far.
The hotel is located in a quiet residential area at least half a mile from downtown. It's family run, and the personnel was very helpful and friendly. Tourists may prefer something closer to town, especially those without a car; however if--like us--you're driving, there's ample parking, also free, which probably isn't the case in town. We'd definitely return.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC