I have been very happy with the 4.4 update. The only issue I have is that the battery doesn't last quite as long as it did with 4.3 on it. It still gets through the day fine, but when I plug it in in the evening, it is about 10-20% less than what the battery was on when I would plug in with 4.3.
I saw on android police that they halted it guess a lot of people actually having problems updating mine has been fine I guess I'm one of the lucky few