Stopped by on a quick visit to Rome. This is a tiny shop with one wall of beer and a fridge on the other side. However, that does NOT mean that the selection is bad. In fact, they have an amazing number of beers from Belgium, Canada, the US, and others. They had one Cantillon, a couple of 3Fs, and a bunch of other great stouts and IPAs. Definitely worth a visit.
Huge selection of bottled beers. Locals well shown as well as other countries. Johnny a fount of knowledge and very accommodating. Tried one of the shop's collaboration saisons with a local brewery which was very nice. Bottles can be cracked there and then a drunk outside on the street. Prices were fair.
Located close to the Vatican and the nearby metro station.
A nice looking store with a decent amount of space. They keep a lot of their beers in fridges, and the rest of them on sturdy shelves in a reasonable cool room (air conditioning is really beneficial in a city with such high temperatures). It's bigger than the other Johnny's Off License store, but they carry about the same amount of beer.
They have a very good selection of Italian craft beer with some real rarities on the shelves. Belgium and the UK are also represented by good selections of beer. Some Danish stuff as well. Only a few American beers when I was there, though, but the ones they had where of good quality.
Staff is friendly. Prices are a little high, even on the Italian stuff, especially on the rarities.
Their website is not very informative though, and isn't updated regularly.
If you're in Rome and looking for good beer, a visit to this store or the other one is really worthwhile.