The apartment is exactly as in the description and looks like in the pictures. It's not huge but surely spacious enough. The location right in the heart of Trastevere is just amazing, all the best restaurants and pubs within a few steps, you can get to Pantheon in 15 minutes, to Forum Romanum in 20 minutes and Vatican City 20 as well.
Luigi was very responsive - getting the keys was easy, there are multiple ways of contact with the host, when we had a problem with electricity the reaction from the host was so quick that we did not feel any negative effect of the problem - all was solved very quickly - this was highly appreciated by us!
Everything you may need is there - even Netflix! This was a nice surprise after all day walking it was nice to sit back and just relax a bit.
There is one tiny negative aspect - there is a pub right below the appartment and you can hear the music, bass especially, the entire day and most of the night. For us, as a couple, it was not a big problem, as we were prepared for the noisy Trastevere (it's normal here, nightlife here is great)...but we did not expect the constant music form the pub. However, I have to add, that we did not find it to be a big issue for us.
All in all - a great experience and highly highly recommend!