The apartment is located ver close to two metro lines and a street - the upside is the you have a very good commute to the city's centre, the downside is that it can get quite noisy in a living room during a day. The bedrooms are located far from the street so you can get a wonderful night rest. The neighbourhood is calm, you have a very short walk to the beach and the sea and a few dining spots/bars. The internet is great, we spent there three weeks working, having on-line meetings with our co-workers and we did not encounter any problems. The only problem is the shower's drain - water collected in the shower tray very quickly, so you had to rush in order to prevent overflows to the floor.
Generally I strongly recommend this place and host. Valencia is a great city and Cabanyal is the best neighbourhood!