these are smaller HR bitrate files encoded at 960x720 stretched to 1280x720. believe it or not, these look better then the 1.07gb 720p x264 encodes from hdtv broadcast. its because of the 1080p HD-DVD source vs 1080i broadcast.
so if you want 720p HD-DVD rips and dont want to spring for 1.43gb or 2.18gb an ep then these are definitively good.
NOTE: S01E00 and S01E01 has a bigger file size to compensate for the extra runtime (75 and 53 min instead of 43)