My best friend is like that. Originally he wouldn't watch it until the season was complete, but now he's waiting for the series to end before catching up. As a result, I have to be careful what I say around him so I don't accidentally reveal any spoilers.
The thing I like about it is that will all the Stephen King fans among the writing staff, there is a lot of character development along with the on-going plots, as well as al ot of references to King's work. I often describe the show as being a bit like his Dark Tower series. (Which I read he recently sold the rights to J.J. Abrams for only nineteen dollars.)