With two other students coming from France, we spent a month at yosef's, and it's been the best decision we've made ! The appartment is extremely well located (the nearest metro station going to the dowtown in less than 30 minutes is 5 minutes away), and way cheaper than any other airbnb we've seen !
Yosef and his wife were extremely helpful when we needed them, and answered everyone of our questions quickly.
Just so you know (and it's precised on the post), you will be in his basement, so you can hear them a bit, and also the metro, but it's not that much of a problem !
We clearly recommand you to go there !