Our families (four parents, 3 children) had a wonderful time at Matteo's property. The view was spectacular, the pool was nice, and the apartment was spacious and modern. The location was up the hill about a 20 minute walk from the Lenno ferry, which we used regularly to explore the lake. Matteo was a superb host, and helped us out with numerous suggestions at any time of day.
Overall, we would absolutely stay there again.
A few suggestions for matteo (all minor):
The downstairs bedrooms don't have A/C, which was fine, but they could use a dehumidifier to make them a bit more comfortable.
The kitchen could use some more cooking implement for those of us who like to cook while on vacation.
The wifi doesn't reach the upstairs - a very easy fix.