Really smooth overall process, great communication & tech. Second round system design interview did not go well because of poor communication with the interviewer: very unclear direction; difficult to understand (audibly); contradictory answers to questions (including about constraints and areas of focus); facilitated and encouraged time-wasting on less important points; also unclear whether visuals mattered more or less than talking through the problem. The question was not very difficult, but it was a strictly timed assessment that started about 12 minutes into the allotted 50 or 60 minutes. The prompt was vague, and I was not able to completely answer all of the technical questions he seemed to be looking for.