We had a fabulous stay. A really spacious apartment with beautifully decorated rooms. The beds were probably the best we have slept in away from home. Two huge bathrooms with great walk in showers and a large kitchen diner, with a snug lounge in the basement. The location is really central - all the main Parisian sights are walkable although the metro is also just down the road. Really close to shops and some lovely restaurants - Da Giuseppe was our favourite for pizza, but booking is a must if you want to avoid disappointment. The area was safe too - we walked around in the evening with no problems at all.
We had an issue with one of the fans in the bathrooms but very easily communicated to Sweet Inn and a lovely engineer popped around to fix it asap. The checking in system is very slick with the app so no worries about losing keys etc.
Not a criticism at all, but for light sleepers it is worth noting that there can be quite a lot of noise through the night with people talking and bin lorries etc.
Overall a great stay!