I applied online in early September and interviewed for the Level 5 internship, which I failed and was moved on to interview for the main team. Overall the process was quick besides when it took 3 weeks to hear back after my mock interview. The recruiters give feedback after your interviews if you ask. I feel as though my interviewers were more interested in me walking in and knowing the solution as opposed to me coming up with a solution from scratch. I say this because although for both interviews I cam up with the solution myself and wrote runnable code, after explaining my solution and went over examples with my code after I was done writing it up, my interviewers had feedback like "is slow in solving problems and should practice more on cs fundamentals". This confused me because the interviews have all been focused on you brainstorming solutions for the first few minutes until you arrive at the optimal solution and then after the optimal solution is found, you code up the solution and walk through it with examples, which I did. I just feel like they want memorized solutions and don't care how you get there. My two cents.