(for the London Office)
These guys were really nice, i didn't get the role but they were very friendly, professional and even after the interview (that i didn't get) followed up and clearly cared.
Christoph was very charming but asked excellent probing questions. One of the better interview processes. A chap called Mo also really knows his Javascript, watch out! (but also a nice guy)
Only complaint, they could have done with a phone call before their dev challenge. I went for a full stack role focused on the backend but they wanted someone for more front end work and some time could have been saved.