Great studio apartment. Location is perfect. It's not too far into the seedy part of Pigalle and the street it's located on is a direct walk into Montmarte restaurants and shops and Sacre Coeur. There are food options everywhere and a super market across the street with everything you need. Most bakeries open at 9am but Pain Pain right up the street is an early riser at 7:30am. Perfect for tourists. Amenities are all updated. The lock on the front door is sturdy. You can see the sunrise from the bedroom. There is an elevator which is a hot commodity in the older apartment buildings of Paris. It's a warm apartment and the heater works wonders for a winter stay. Pigalle is your nearest metro stop 1 block away.
Thony greeted me and although his English in minimal we figured it out. He also speaks Spanish (I don't). Sophie was great with communication.
The apartment can fit 4 people but it'll be a tight squeeze since it's a studio and there isn't much space for towel hanging in the bathroom or closet space. We were 2 people so it felt like the fit was at capacity. We had the couch pulled out as a bed and it did take up quite a bit of room so that would be hard for 4 people also. The lighting in the apartment is minimal. If you're not high maintenance then 4 people will be just fine.
The neighborhood is definitely not family friendly. It's a party area and Thursday/Friday/Saturday nights can be loud. There can be drunks and people a bit off wandering about. That's where all the sex stores are and Moulin Rouge. We were on a girls trip so it was fine for us but not for anyone with kids.
The studio itself is great and cozy and I would stay here again.