I got the MTZ for a while now... and I can say I'd buy hem again...
they are great tyres on the most applications and so far never let me down...
the difference in traction against my old all terrains is massive and they made my pajero go like I didn't even think she would go...
I think MT has it well sorted but it's a bit like food - or girls...
every man has a different taste ;o)
oh I forgot - no chipping so far and I got 30000 on them and heaps left -- look after your tyre pressure and you will be fine with the most of the brands...
cheers
Tom