Haphazard. Interview slots and times changed at the last minute.
After your phone interview you'll be called in for a couple of interviews with your respective line manager and probably an executive from the US.
Expect these confirmations to come in at the last minute, be subject to immediate change, and in many cases you will probably have to chase them to find out what's going on. They will not respect your time.
Oh, and when all is said and done they will refuse to give you any feedback.
On the plus side, they seem to hire a lot of graduates.
I wouldn't waste my time with this company, they seem to think they are a cut above everyone else but their performance and market presence indicates anything but.