Had an excellent trip to Venice including our stay at Mario's. He was very accommodating from start to finish. It was acqua alta in the city during our stay and there was some water coming into the apartment since it's right on a canal. It turned out the pump to keep water out had been inadvertently unplugged by his cleaning person. We messaged Mario and he was there within 5 minutes to restart the pump and clean up the wet areas. He couldn't have responded any quicker. Breakfast provided the next morning which capped a nice stay in one of the worlds best cities. If you're looking for a quaint spot out of the heart of the touristy section but close enough that it's no problem to get there with a host who'll ensure your stay is as enjoyable is possible then Mario's is right up your alley.