Lacopos place is a great apartment. although it's small, it's a really comfortable apartment with everything you may need.
We were here with our 2 kids and it was wonderful.
it is 5 minutes from the metro and 2 minutes from some of the buses that take you to the center and if you don't feel like taking the public transport, you can also just take a walk towards Piazza San Pietro and it's surroundings.
Lacopo is very responsive and helpful.
Tip - If you're hungry and don't feel like moving much, take a walk up in Viale delle Medaglie d'Oro (go left when you exit the building) and there are some nice restaurants 5 minutes from there