Hard, run through three different interviews for different departments, each takes around 15-20 minutes. One from general, get pass, go upper, get pass, go to direct mentor, after three rounds, you still need to wait for the outcomes, there is no clear ddl or waiting period notified for you.

Overall really fast and friendly process. Took about 10 minutes to finish the first stage interview through phone. Easy to communicate. Flexible to ask to accommodate time for interview while studying in UK