Glad someone started this thread. Courtesy of a fellow fiend here on the boards I was able to watch all three Ju-on flicks (that's the two TV movies and the theatrical flick). Thoughts...
Ju-on: Scary as shit and perhaps the most effective, and my fave, of the trio. The visual and audio frights must be experienced in a dark room. I freaked. Seek this one out first and watch it!
Ju-on 2: Unfortunately, the first 30-minutes is literally a rehash of the first film "Friday the 13th"-style. I mean, same footage, EVERYTHING. However, about halfway in, the new story arc picks up and concludes. Some great scares but plot-wise feels like forced and rushed. Still wicked freaky though.
Ju-on: The Grudge: I thought this was disappointing. The frights feel pasteurized and, honestly, they border on explaining too much.