Marcos Appartement is great, quite newly renovated and has everything you need. The plus is the garage for the car, while you can walk to the cities center in 10 minutes. It is a good base to explore the lake.
Marco is a wonderful host, he took time to explain everything and was also there kn between kn case we had a question or he helped our with recommendations, which were all nice.
It can be quite warm in the apartment, but luckily there is a ventilator which you can use. We can recommend staying at Marcos place. Enjoy Riva and the Lago di Garda.