As a solo traveller, Ash's apartment was exactly what I needed. It may be small, though this is clearly reflected in the photos, but it is the perfect size space for someone travelling alone. Truthfully, I would also be content staying there with a partner because the reality is that Paris is such a gorgeous city you rarely spend time in the apartment anyway.
I have high expectations when it comes to cleanliness and the apartment had clearly been well looked after and thoroughly cleaned between visitors. I felt completely comfortable throughout my stay.
The biggest benefit, in my opinion, is the location - Conveniently located less than a five minute walk to both Gare du Nord (Eurostar, RER, Metro) and Poissonniere (Metro). I was able to walk up to Sacre-Coeur in 15 minutes and to Saint-Germain in 45 minutes.
The area felt safe and I never felt uncomfortable coming home at night on my own.
The only thing I would have done differently is bring my own pillow as I didn't find the one provided very comfortable. This of course is just personal preference.
I would definitely stay again next time I'm in Paris. Thank you Ash for your lovely hospitality!