I was in Tieto Ostrava for an interview. I must say it was very nice, and czech girls are just beautiful :). However I didn't get the job, it was complete disaster from my side, I was completely unprepared. I had interview with HR, PL and SA, there was questions about my experience, my skills, everything from the CV, no deep technical knowledge. So if you are going to Ostrava for an interview, you better prepare yourself ;)