Walter's place is a great urban retreat for non-traditional travelers. Posh and elegant it isn't, but it's fun and young and it feels like a treehouse for adults. All the rooms have beds in lofts up rail-free stairs. Beds are comfortable and are tidied up every day by housekeeping. Location is great, right in the heart of Roma and near lots of great shops and restaurants.
It is located on top of a restaurant, but the restaurant is pretty chill after 11pm/12am at max. It wasn't a problem for us. The 3 rooms with windows do look down over the lovely restaurant courtyard and the immaculately maintained plants, but they have closet showers that are 3' x 3'. The other two rooms do NOT have windows, but do have much larger showers and skylights in the showers, so they kind of balance out.
Access to the unit is through the main entrance of the building (and the restaurant) so if you come late night from partying, the grumpy security guy has to wake up and let you in and let anyone you have over out, there's no in or out after hours without the security guy.
The rooftop is really pretty and vast, with a private tub (extra fee required). Cool space that is probably underutilized by most guests.
I would stay here again.