It's definitely a one-of-a-kind view, and if you've got the money to spare then why not, it was truly a beautiful sight seeing the Sacre Coeur illuminated at night and to be so close to appreciate it.
Unfortunately the rest is a pretty regular flat really, nothing too fancy..I think the main annoyance was the rather overpriced service and cleaning fee for which there wasn't even toilet paper in the apartment and the only light in the toilet was broken..I mean these things happen and it's not the world, but it was kind of a weird thing to not look out for and just left a sour taste. Walking around Paris searching for toilet paper before the shops close..it's just not something you want to do or expect to have to do.
At least not for that price...but hey, the view was amazing.