Great place with an amazing view. The neighbourhood is perfect with the narrow, old, cobblestone, European style streets.
Lots of sites within a ridiculously short walk. Even the waterfront feels super close because it's downhill.
The tram is literally straight out the door. The yellow trams are the standard public transit that'll take you all over the city and the red trams are if you're looking for the tourist sightseeing experience.
There were two downsides. 1) the hills - unless you're looking to build your calf muscles, though transit can take you back if you don't want to walk uphill. 2) the stairs to get to the apartment are steep, but that's the price you pay for the views; the hosts offered to carry my bags up for me though.
Language will not be a barrier for you if you speech English or Spanish. Many restaurants have waiters that speak a bit of French too.