Ari's place is amazing, and yes you have the stairs to contend with but this is by no means a deal breaker.
It was fantastic having the balcony and the terrace and Ari is an amazing host.
The apartment is lovely and has everything that you need. Perfectly situated for all attractions and easy access by either public transport or foot.
I would highly recommend Ari's apartment and can't thank her enough for all her tips for getting around this beautiful city!