I was contacted by an internal recruiter and asked a few general questions about my skills and what I was currently doing. This person really concentrated on telling me how great Athena was and what a good work environment they have. They cared about career development for employees, had really good benefits, and I'd get to work with a lot of nice, smart people.
After that, I was told there was a programming puzzle to solve before I came in for an onsite interview. I could use any language I wanted and take as long as I wanted. He sent me the puzzle and said let me know when I was ready to submit.
It was a fairly difficult problem that really involved more statistics than it did programming. I had a few questions about the puzzle, but I could only talk to the non-technical recruiter, so that wasn't much help. I was pretty busy that week, so I worked on it over the weekend and submitted an answer that was correct according to their specs. But, they did not understand the output(I admit, it was complex), so they just told me to try again.
I didn't get a chance to work on it until the next weekend, and I created a new program that gave them exactly what they wanted. I submitted Monday and it passed all the test cases they gave me initially. But, they tried some other test cases and found a small bug.
I fixed the bug and submitted again. Then, it passed completely.
They asked me to come in for an onsite interview which would last 5-6 hours (aka "an entire day") at which point I refused. I had already taken 2 weekends to show them I was capable. Another day long interview was going way overboard. If they have this little respect for my time and I'm NOT an employee, I wonder how they treat people that are actually on their payroll.