Short Version: I found this gem two days before my trip; this place was the best idea ever. Diego quickly responded to my messages and provide an excellent guide prior to check-in. STAY HERE :)
Now for the long version:
* Space: the place is super designerly, as a design-centric person this was a slice of heaven, it actually made me rethink the decor of my own home; a bit on the small size but it is PERFECT-sized and comfy too.
* Location: Walking distance to the beach (6-1 0 mins max), the train station is a block away and if you want to be a CARIOCA, you surely will need to ride the train :). There are two restaurants on the same block and plenty of shops on the main road (a mall is ten minutes away, you can exchange money there)
*Amenities: There was water, beer, an awesome soap and shampoo that I need to ask Diego to help me purchase. Towels, an iron, and toilet paper were well stocked.
Wifi: it is a bit slow, but this is normal for all of Rio (at least in my experience)
Private entrance with security 24/7.
All in all, I highly recommend this space.