I stayed at Nikki's for 10 days for a work related trip.
The pros: the wifi was very speedy and reliable, which is always important for me. Nikki was responsive and helpful as a host. Check-in was flawless because both the building door and apartment door were opened with a code. The location was absolutely fabulous, and in one of my favourite areas of Montreal. The back patio was calm, relaxing and a nice place to enjoy my morning coffee.
The cons: the level of cleanliness led a lot to be desired, as pointed out by other reviewers. For a 10 day stay I never quite felt at ease because of the dust and grime. Although Nikki rectified it immediately, there was no toilet paper available upon arrival, and the apartment was lacking basic amenities that I would have expected from an apartment of this nature (no hand soap, no dish towels, no cooking amenities, etc.). The mattress was not comfortable, and sagged in the middle (pulling up the mattress revealed broken slats), and the linens were actually just 3 sheets; 1 covering the mattress, and two "sandwiching" the duvet (so no real duvet cover), which meant I woke up every morning on a bare mattress with a bare duvet due to the sheets of course shifting around while I slept, which did not feel hygienic or comfortable. Also, while I am not usually someone who is bothered by noise, the upstairs neighbours fought constantly, and were extremely noisy from around 10:30/11pm until 1/2am, so I found it hard to sleep some nights (though I fully recognize Nikki can't solve this issue himself). Therefore, I would recommend this Airbnb for short stays only.