Fantastic vacation rental - Highly recommended!
My girlfriend and I stayed at Parc Royal for 4 consecutive nights in September 2017. The location in the heart of Le Marais is wonderful (try Page 35, the small cafe next door to the vacation rental), and the rooms themselves are very well-appointed (Tony, the proprietor, runs a gold-leaf restoration business; his handiwork is visible throughout the entire complex).
Most importantly, the service is near-perfect. We had an issue with our in-unit washer/dryer during our stay, preventing us from doing our laundry. We texted Paul and Tony, who replied promptly (within an hour). They solved our immediate need by giving us access to another unit's washer/dryer for the day, and arranged for a electrician to come in the very next day to solve the underlying problem. The issue was resolved within 24 hours.
So - highly recommended. We're looking forward to staying at Parc Royal again next time we're in Paris :).