I have its Kioti twin CK25, except in gear shuttle shift. I'm very pleased with it. These tractors have enough weight to be very effective for ground engaging and loader tasks, far better performance than their size might indicate. As for the HST, yes there have been some complaints about it being undercpowered but I suspect that is from many who try to do too much in higher ranges. The 3 range HST should yield the correct power points for most tasks. Some expect these tractors to work faster than they are intended.
I do have to admit that I went gear to maximize power. And have never been left wanting for more power, to the ground or to implements.
I say if the price is right, and you are looking for a digger/hauler, go for it. They are fine tractors.