Excellent place to stay in Rome. Apartment is spacious and spotlessly clean. Also has everything you could concievably need including a sewing kit which we needed to repair a bag. There are board games and city guides, interesting books to read dotted around the living room area. The kitchen area is well equiped and has a selection of spices, olive oil etc. A nice touch was that a carton of milk and a large bottle of water was left in the fridge for our arrival. There was also a selection of snacks. This helped greatly as we arrived quite later and the local shops had shut earlier, but enough was provided to see us through till the morning to go shopping. WIFI is excellent and we had no problems connecting to it, we also found it to be extremly reliable. Rooms are light and have tall ceilings. Fans are provided in the bedrooms which means they can get a little stuffy on hot days (with no aircon). Keeping the blinds down and windows shut on a hot day can elleviate this to an extent. Air con is provided in the living / kitchen area. Hair dryer and Iron provided so no need to bring these. External access is through a large communial door which leads into an inner courtyard with a number of trees which give a nice bit of shade to the bedrooms. Access to the aparment is up a single short flight of stairs. There is a lift (but we didn't use this). San giovanni (visit the church which is amazing inside, most people will skip this. But its well worth a visit) metro station is a 10 min walk. This is Line A that will get you to Spanish steps, Vatican, trevi fountain, pantheon and with walking ditance to villa borgese park. Note the drinking fountain near the Metro which you can use to fill drinking bottles. Also there is a great gelato that sells real fruit, home made ice lolleys which are amazing. this is just after the fountain and before the metro station. the Colloseum is maybe a 15 to 20 minute walk in the opposite direction to the metro. Part of the route is very dark on a night. an uber is relatively cheap to get here. or it can be done on a rentable scooter in around 7 minutes as I did. (these and bikes are dotted around everywhere in Rome.) The apps you will need are Lime, bird and Dott. At the time we visited quite a few of the shops and restuarants were shut as owners had gone on holiday. But there is more open in San Gionvani. Ottaviano has a nice shopping area with quite a lot open. Would recommend the Amalfi restaurant a short walk from station.
The hosts are great and will get back to you very quickly with any questions that you may have. A really great experience would book again.