We had a bit of a rough check-in experience saved by the very friendly and accommodating cleaners, and a pleasant stay once we landed. My brother and I worked remotely and explored Paris from this compact one-bed one-futon apartment in a classy area of Paris. It worked decently well for this.
We booked the apartment the night before. I sent several messages and didn't hear from the host. We arrived and eventually called her. She wasn't aware that we booked the place, and manages several properties, so didn't seem sure which one we were in. We eventually got into the building, then followed a kindly resident into the specific wing of this apartment. The local cleaner helped us locate the unit and allowed us to store our bags in the apartment and gave us keys. The host was friendly and apologetic and was trying to coordinate with the leader of the cleaning crew, but we didn't see any of these people. She then sent us check-in instructions with access codes.
Note that the house manual provided in the listing has access codes in it, but these access codes are wrong, so you need the ones she provides directly.
I can't speak to bag storage in general, but the silver living for our experience is that we could leave our bags in the unit while the cleaners cleaned.
The unit itself is on the first floor, and there is a small elevator. The unit is compact but very nice and well-outfitted. There's good natural light, it was quiet, and the bed was comfortable and the futon was decent. My brother and I stayed here together. There was additional bedding for the futon. I slept well.
There is an in-roof AC that worked well and the apartment was cool and dry while Paris was hot and humid! The WiFi was good and we worked remotely around the kitchen table with no problems. The kitchen is compact but well-equipped. We didn't cook but we made plenty of nespresso and had takeout with the provided plates and cutlery.
There is no laundry facilities here so I can't comment on that. (The listing is correct!)
The bathroom was great if very tiny! My knees were against the wall while using the facilities. (I'm 6'2).
The location is pretty good, it's a 7 to 8 minute walk to the train station we used the most. There's a few good places for food right on the road. Check out COJEAN, it's a healthy takeaway option that was great for us to find some salads we could grab in the mornings, a good way to offset a lot of the rich Parisian cooking you're otherwise eating.
All in all, I would recommend booking this place early to give the host plenty of time to know you're coming, and suggest to the host to improve the house manual and to decide whether they want to allow last minute bookings.