We had booked a weekend on the houseboat and had a great time. The boat is very spacious (for a boat, that is ;)), everything you might need is available, the kitchen is well stocked, the living room is cozy, the bad is modern ... I could totally see ourselves spending a few more days there next time.
The only downside was the communication. We booked the boat during peak season and Viola mentioned that some of her colleagues were out sick. But the entire process was difficult: the check-in time has never been confirmed, even though we had mentioned that my boyfriend only speaks English and asked whether that would be ok for the instructions, it seemed to have been a big deal, the entire induction took 3 hours and could easily have been done in 1. It's unfortunate when our vacation time is being used to explain how the guest book "works". It's pretty obvious :/. The colleague who did the introduction was also everything but born for the hospitality industry. We were greeted with an "endlich" when we arrived and the way he spoke was rather vulgar. Now I know that maritime language can be a bit rough, but I don't need to hear several times how to move the "Arsch" of the ship. We could also have saved significant time, did we not have to listen to stories of what other stupid tourists had all done wrong in the past. It's just overall not a very pleasant way to start your vacation.
If we would have stayed longer, the above would likely not have mattered that much. But given that we only had two nights, we felt that we wasted the entire first evening. The induction took so long that we didn't have the time to leave the dock, as it started getting dark soon after.
During the trip, we tried calling Viola a few times to ask whether we could extend for a night, but couldn't reach anyone. We ended up not extending, but it's not ideal to no be able to reach anyone, given that things can easily go wrong on a boat or we might have had an important question.
Check-out was equally challenging, as no one was there to take the boat over when we arrived and we couldn't reach anyone via phone. Until this day, I haven't received a confirmation that everything's ok, even though my WhatsApp message asking to confirm the time of return have been read.