I applied online. The process took 2 months. I interviewed at Intuitive in Nov 2016
Interview
Had an initial phone screen with HR. Then a phone call with the hiring manager. Then an onsite interview. I was interviewed by three people. The second person didn't seem very prepared for the interview and did not have any questions prepared for me. I enjoyed talking with the other two interviewers as they seemed enthusiastic about what they were doing (job/being at the company/wanting to hire an intern/etc).
I applied through an employee referral. The process took 2 months. I interviewed at Intuitive (Sunnyvale, CA) in Nov 2014
Interview
Did a phone interview after I filled out application. Came in and talk to people in my department. No technical, all behavioral (applied for a business-related internship). They were fairly fast in getting back to me, and it was a smooth process.
I applied through college or university. The process took 4 weeks. I interviewed at Intuitive
Interview
I met a recruiter at my school's career fair. She forwarded my resume on to hiring managers and I was contacted the next month to set up a phone interview. The first interview was fairly casual, just going over my resume and making sure I could communicate. I had a second interview the following week with a different interviewer, and the questions were a bit more technical. A couple weeks later I received a verbal offer. Official offer letter followed.