To give background, I booked a whole month and only stayed for half of it.
I have only positive things to say about Marissa and mostly positive things for hostel as a whole, but Dan if a bit of a different story. While I generally think he means well, it's hard to get around the constant stream of racist, sexist, and homophobic remarks from him. Additionally, he is very lacking in both common sense and business sense when it comes to running a hostel and the hospitality industry.
My biggest issue is that he decided to invite his entire family to the hostel during a large portion of my stay. I could live with there being a couple 12 year olds and a 14 year old, but the 2 year old alone made me ask for my last 2 weeks to be refunded. A hostel is NO PLACE for a 2 year old. This kid would run around chucking guests' belongings across the room, hitting people, waking the entire hostel up at 6am every morning, etc.
The reason I don't give lower than 3 stars is that most others will never have to deal with these things, and Dan it's only around during the winter anyway. To put it another way, I would probably give the hostel 4 or 5 stars while Marissa is running the show, but likely only 2 stars with Dan there, and only 1 if I were only judging the hostel specifically based on my experience of feeling the need to leave 2 weeks early. I did get my last 2 weeks refunded, but I lost my monthly discount, which I think is a bit wrong considering I only left because of something that should never happen at a hostel to begin with.
All those things aside, it really is a unique and interesting hostel, and you likely won't have to deal with many of the aforementioned issues.