The movies have been compressed down in size from the originals. But generally they're still ok. Some are reduced so they can fit onto a CD to create a VCD & some so they can be burnt as a SVCD. And some are split into 2 or 3 parts to maintain as much quality as possible.
Some movies are not so good b/c the people who do the extractions & conversions use cheap nasty softw to do it & the softw just doesn't do a good job. And some are by newbies who don't know how to do it well even if using decent softw.
You can preview the movie before downlding it all. You can also do a bitzi web search to find out if it's been listed & see what the reports about it are. See 1.
Bitzi Web Lookup ... & 2.
Movie download issues