I've been staying in Hotel Particulier de Montmartre at September 2008, and that was a great experience. It is not the standard hotel - you will not find minibar in the room for example and there is no gym/swimming pool, but if you want to spend romantic and unforgettable time - this is exactly what you need. I will definitely stay at this hotel next time.

This is a hotel that would suit a romantic break where privacy and seclusion are top of mind. Certainly not a hotel for a Paris stopover or business trip. The hotel itself is beautiful on the outside, but a little tired and tacky inside. While the room was huge by Parisian standards, and had a certain charm, it was a little disappointing - a little scruffy around the edges (e.g. ropey old sofa in the corner) and with few amenities (don't bother if you need wifi, world TV, room service, or even a chance to make yourself a cup of coffee). Location wise - it's peaceful being hidden away, but with no food available (aside from breakfast) and a key system to get in and out it felt rather cut-off from the outside world. Staff and service were very friendly if a little chaotic (which for a hotel with only a handful of rooms was puzzling). Ludicrously expensive per night for what's on offer. Should really be classed as an interesting but no frills B&B. As another reviewer commented - it's really nothing special for what's being charged.

Perfectly acceptable stay but without real charm and nothing to exceed expectations. In addition, the prices are a bit on the steep side given amenities & service. Wouldn't go back.

We loved hotel particulier, it is situated in a lovely garden secluded from the bustle of Paris, yet metro, restaurants shops are all in close proximity, also this area of Montmartre has a lower volume of tourist traffic.
It was a private residence until converted to a hotel but the room proportions were left intact, so they are really spacious and quiet, sheltered from traffic noise. I will definitely return when next in Paris, although we were offered a special rate when we booked so it represented good value.
It offers something different to other hotels that perhaps you mightn't find elsewhere. You should note that when we were there the bar was only open Thurs to Sun and it is a great pleasure to sit in the bar in the evening, although the peace and tranquility outside of these days brought their own reward, hard to fault!