Nice place, went for a dirty weekend with the wife a couple of years ago. Not sure I’d want to spend a whole week there, it’s not that large. Still, it’s got a very tatty charm to it, dirty and old but in a good way. Nice walking, good food in the restaurants down by the river, the bridge by Eiffel is pretty impressive, you can take boat trips up the river (we didn’t, but they looked quite fun), the obligatory trip round one the port cellars…
My memory of the place is that’s it’s hilly with cobbles, not ideal for biking, but that could just be the part that runs down to the river – the rest could be fine. No idea about bike hire, we drove over from Madrid.
Be happy to go back again, so definitely recommended.