I interviewed at Rackspace a few years back on the ops engineering side. It was part of a bigger recruiting push they were doing across the metroplex area I live in.

It involved a similar schedule of interviews across multiple teams in one day. Only 11 people apparently passed the tech pre-screening to get to that point out of the whole area. Interview process went great. It included a number of different fields at varying depths, yet didn't feel over the top at all. It was a very fair and positive experience. There seemed to be real interest from several of the interview teams.

Then the offer came. They wanted me to relocate for a swing shift chat support position at half my current pay even after shift bonuses. I don't know how you go from discussing Openstack production implementations (back in the Essex/Folsom days when you couldn't find anyone that knew that stuff) to basic Linux chat support.