I can't disclose the question details, but I can say that one of the questions I got was extremely hard. This is the type of question that basically requires you to have seen it before. Even though overall I think I did well in the other interviews, I bombed that question, which I think was the main reason I didn't get an offer, but I didn't feel bad because I wouldn't have been able to solve it even if I studied more. As someone who regularly interviews others from the other side of the table, I don't believe in super hard questions. You might get geniuses or those lucky enough to have done them, but you really end up losing a lot of good candidates.
Another problem was lunch interview. Yes! Lunch is an interview. I didn't know it before and it was a surprise when I thought I was going to relax and recharge in between the interview marathons, but ended up being told that lunch was also used as behavioral interview. (At first I thought my lunch buddy was joking) The format was awkward at best. The two people eat in turns so that one can answer questions while the other can eat. I suppose it makes sense for them to gather as much data as possible, but I didn't think any other positive data points was able to save me over the aforementioned tough question. And to compromise a normal lunch, is simply, a little too cruel.
The people I've met from the interviews all seemed to like working at Snap (of course), but I'm doubtful if I'd want to work there even if I did get an offer. Having said that, I really enjoyed the design question with the manager. He seemed like a nice and positive guy, who showed genuine passion for his job and appreciation for my work during the interview.