This is a lovely flat in a great location. You can walk two minutes to amazing restaurants and cafes, and all the major tourist sites were 15-20 minute walk. We were two friends traveling together and this space was perfect. AC in the main room and bigger bedroom. New windows that sealed shut, shutters that blocked the light if you wanted to sleep in. It’s in the first floor up, so not a dealbreaker with luggage. There is an elevator but we were told it was slow and we didn’t use it.
I think it would be a tight fit for 6, especially as the much smaller second bedroom has a trundle. I imagine it would be fine for two small children to literally climb into the trundle (once open it would fill the entire width of the room) but not feasible for two adults to share that room. Great for a couple with kids.