Don't see how anyone could reach conclusions about overall quality of any brand based on comments in a forum like this. First, there are no accurate market shares for the different brands made public, as discussed in another recent thread. So, if a brand with 10% of the market gets 10x the "trouble comments" of one with 1% share, they are really about equal, for whatever that tells us, but lacking that information, you could easily reach a different judgement. Equally important, comments like that are "anecdotal"... you don't know anything about the circumstances, so it's hard to generalize. Plus, Chim's observation about who will comment sounds about right to me.
I would tend to trust the word of experienced owners who have been operating their tractors for some time. On that score, Kioti has some strong credentials... there are many such Kioti owners who speak well about their equipment. Even though I'm a long time Kubota owner whose equipment has been totally reliable, if I were in the market for a tractor today, Kioti would be on my short list right along with Kubota and a couple of others.