Despite what other reviewers are guessing to be true, the video quality of the episodes in seasons 1-4 in this complete series set is NOT an upgrade from the original DVD season releases. I have done an extensive side-by-side comparison and the transfer is unquestionably inferior with the new set. Colors are washed out, detail and definition are reduced. It's a very stark contrast. The video bitrates are markedly higher for the old discs vs. the new. I'm noticing bitrates that are as much as 30% higher in the head-to-head comparison.