Tigra C.
Yelp
First of all, I cannot believe that no one had added and reviewed this place yet! Whether you're traveling solo or with a couple of friends, if you want to have fun while saving your coins, I'd recommend Comics Guesthouse.
This place treated us well during our 3 days in Roma. Tucked away in a residential neighborhood, it was a little off the beaten path, but close to metro and the River Tiber. I felt safe walking anytime of the day or night, and actually took quite a few night strolls.
If you like walking, it's about a 10 minute walk to Castel Sant' Angelo and about a 30 minute walk to Vatican City.
There were 3 of us so we had a room with a double bed and a bunk bed. I can't remember the exact theme (each room features a comic theme), but it was black & red. It was a spacious room and the bathroom was huge! Everything was clean and I was very comfortable.
We didn't spend a lot of time indoors so I don't remember much about amenities, other than the free breakfast and free wifi. I loved the large figurines of Iron Man and Superman. Take a look at their website to see the awesome themes available.
I emailed them to make my reservations.
It's classified as a hostel on some sites, but don't let that scare you (and stop watching scary movies!). It's an awesome guesthouse!