Lavinia's apartment was beautiful and she herself was wonderful. My family of four (all 18+) had more than enough space and really enjoyed the central location. And Lavinia herself is an incredible host! She was great communicating with us prior to and during our stay-- couldn't ever ask for more :)
This is the perfect apartment for your first visit to Rome, right between the pantheon and the trevi fountain. You couldn't ask to be more central! You're also right in the shopping district which boasts some wonderful restaurants and high end stores. I absolutely recommend this flat!
The only things you should be aware of is that a central location does mean some noise (especially during high season) and so if you're a very light sleeper you may want to factor that in. But we enjoyed being so close to all the monuments and then being able to stroll to more local neighborhoods for food and general exploring :)