As others have said, it's just a salesman talking smack! Of course he's going to talk bad about the competition especially Kioti. Kioti is a good brand and builds a quality product. Are you going to have a problem and need a part? Who knows, same as you could w/ Kub. or JD. They are machines, things can go wrong. Hopefully not, but it can happen.
Kioti has good parts availability on their more recent and current machines and hopefully will continue that. Kioti just celebrated it's 30 anniversary of being in the US. Some of the very early tractors are getting a little hard to get parts for but I think as Kioti continues to grow and get more and more machines out in the market, their parts availability will get better and better and go farther back on their models.
I have a 2011 CK30 w/ @ 450 hrs. on it and use it hard. No problems. The new model tractors, CK10's and NX's are even nicer.
So just disregard the competitive B.S..