We had a very nice stay in the apartment. It was in good shape and ideally located within Riva. The check-in was no problem (key safe at the apartment). The apartment was very clean. The only 2 aspects that were not optimal were the parking space which was quite narrow for our car (a midsized SUV). And the communication and welcome was not so heartwarming as we know if from other stays at Airbnb. We missed a guest handbook (e.g., for TV, waste deposal, air conditioning). But these are small details.
Overall, the apartment from Oleg is a good choice for everyone visiting Riva! Especially for visits to the lake which is really only a few minutes on foot.