Overall I would recommend people to book and stay at this apartment. Like most have reviewed it is modern, attractive, and the pool/spa is nice to have. I probably would only book this place once. The pool is good but downstairs with the living room and layout makes the living area not that useable. I would prefer giving up the pool and finding a place on a second or higher floor that has a nicer open space with kitchen (real kitchen) and everything else.
The bedrooms are on the ground floor as you enter (and the pool/LR is below in the basement). This means the windows open up directly to the street and when you open them you are actually below the street looking up at people walking by and cars/motorcycles driving by. Lots of noise happening and you feel so close to all the noise because of the room location.
With that said I have to reiterate this is clean and really cool looking/modern apartment and we are so glad we got to stay there one time. It is just a return trip to Rome where we would prefer a more traditional apartment that is on a higher floor with less noise. One last thing the location is almost perfect. Equidistant to the Central sights and Colosseum while also being close to the River and an easy walk over to Trastevere.