Domenico is the perfect host: friendly, amenable and easy to get a hold of. The place is the most innovative studio I've ever staid in (pretty much everything is -very professionally -made by hand and there's interesting touches all over the place like flicking a switch to turn on jazz music in the shower). The trastevere region is great: lots of places to eat and drink and little shops and just across the river from the main touristy stuff. The only tiny thing to consider is that trastevere can be a bit animated on a Saturday night which can make it a touch hard to get to sleep if you're a light sleeper. Otherwise it's absolutely perfect.