As others have noted the flat is really well located both in terms of getting to other places both on public transport (you've got convenient Metro and RER stops nearby) and walking. There are a whole bunch of food shops on the street itself and you're a few minutes from dozens of restaurants in the Marais. It was rather cold when I was there and I was there for work so didn't use the terrace much but can imagine in nice weather it would be a real treat. The flat is incredibly well furnished and the shower is brilliant (proper water pressure). The only minor quibble I had was they've removed the door to the bathroom (I'm guessing from a previous comment that they're trying to fix the fact that it was sticking), so the flat is great for one person, but I'd be very wary of going with someone else at the moment as there would be no privacy at all. But considering how well kept the flat is, I think this is probably something they're in the process of dealing with rather than something long term.

It really is a great flat and I'd recommend it to anyone (well anyone who doesn't have mobility problems-- those 5 flights are not to be sniffed at!) I hope to come back again when I'm in Paris for pleasure and not work and stay there again.