Jim and I have been watching these for the past two weeks. I can only recommend through season 3 (which we are in the middle of) because the few that I have seen of later seasons are not as good. I won't make a recommendation or judgment until I have seen them. This is not just a dork squad sci fi show, like Joss Whedon's other show (and previous brix pix), Firefly, it is emotional, funny, clever, and engrossing. The second season is especially noteworthy. It is true, there are many hours, but I think the winter is the perfect time to start a long viewing event on your couch.