N.B. This hotel is also known as Ostello Per La Gioventu Genova, and Youth Hostel Genova. Tripadvisor has it listed under TWO seperate hostels, this one, and also 'Genoa Youth Hostel'. THEY ARE THE SAME PLACE. I have put this review up on both to avoid confusion.
The hostel being the only "affordable" place we could find that did not have terrible review on sites like trip advisor, we decided to go for it and feel eternally young (at 38 there is still room for "youngness"... We booked a twin room with ensuite bathroom and ended up having a complete dorm for 5 just for the 2 of us... Great! The room was very quite at night (partly thanks to the second door, but also because the rules about making noise at night are well respected). Also, I ended up putting my mattress on the floor (the bed being way too soft).
The place was very clean, rooms being cleaned every day. But the wifi was extremely slow, the breakfast quite a joke (unless you like a croissant out of a plastic bag etc...) but cheap (2 euro). We made use of the water boiler and microwave but did not dare chosing something out of the vending machines... One thing really missing in a hostel was a fridge or facilities for self cooking (which led us ending up looking for a restaurant on a Sunday night, which isn't all that easy...).
The building is quite high, but there is an elevator.
We had read it was a "modern youth hostel", but everything had already undergone quite some wear and tear and the place seemed to miss some modern amenities.
Travelling by car, we were happy to find a free car park at the facilities. Downtown (litterally) being far away (30 minutes by bus, don't know how many steps down...), you should buy yourself 24 hour public transportation bus passes. The buses drive quite regularly (but again: on a Sunday you should prepare your trips quite carefully if you don't want to end up waiting for 40 minutes because you just missed your bus).
One tip if you like your sights from a height: walk just a little more up to the castello. You will have great sights on Genova, from the ruins of the medieval defense system... (and enjoy some fresh air in the woods).
And also: the view from the terrace is terrific! Being nearly at the highest point of Genova, you have a great view of the port and the city...