Brand new place, nice service, clean and very affordable prices in a centric area of Rome (half way between Terminus and the Colisseum).
They don't say in the webpage it's placed in the 5th floor of an appartment building. The rooms are so new they still lacking some things, such as a proper light in the bathroom. They don't accept credit cards so you have to pay in cash. Plus, they didn't give us an invoice, which is quite weird. Anyway, overall I would recommend the place.
With a stay at B&B Chain Gallienus in Rome (Monti), you'll be a 3-minute walk from Basilica di Santa Maria Maggiore and 10 minutes by foot from Via Nazionale. Featured amenities include complimentary wired Internet access, express check-out, and dry cleaning/laundry services. A roundtrip airport shuttle is provided for a surcharge (available 24 hours), and self parking (subject to charges) is available onsite.