It was very smooth for me, I was interviewed by two supervisors and it was for about 30mins. Prior to that I had the recruiter called to brief me on the salary, location and what the job description was

Total four interviews in general for each position. HR interview - relevant department staff interview - department manager - related another department manager interview. If HR contacts you fast after you submitted the application or just after interview, it means you have a chance and you will continue in next interview. If you don't hear from HR after the interview within 3-5 days, treat it as rejected. There is no need to check with HR, because I have encountered below listed answers week after week: 1) your status is on hold; 2) manager is out for trips and don't know when he will come back (this is a lie as their manager is at company and had no plan for business travel lately); 3) due to internal issue they are unable to move forward; 4) no reply; 5) no reply; 6) said "apologies" when I had to text him for a result. I thanked him for sharing the result with me, and would like to know whether there is any place i could improve myself to be more qualified, HR never replied ever after. I am impressed by their unprofessional HR and the diverse excuses/liars they gave which candidates could even find out by themselves. When most applicants just want a straight answer regarding the positions they are applying for, Tesla HR is proficient at delaying the answers month after month. I should really give a "thumb-down" for the overall experience, but I believe the people in other departments devote better to their work at Tesla so that they could make a car that customers feel proud of.