It depends on which part of the Amazon organisation.

The ones in Amazon Instant Video in London are useless. Particularly in identifying suitable candidates for the AIV Retail Website stack. They've burned out their hiring credibility in London to the point that the three hires to London in 2013 have been from East Europe. Plus churning and burning through university interns. It's been a desperate mess for a good two years now.

I hear positive things about the AWS hiring process.