I just bought an MT357HC about a month ago. I have 14 hours on it now. I am fairly hard on equipment, I run a sawmill and logging is no easy task for a tractor. Heavy lifting and transporting logs over uneven and often muddy terrain. In the 14 hours I have on the tractor, so far I have not detected any weaknesses. It is very strong, great lift capacity, smooth, quiet, and fuel efficient. I love the cab. I came from a Kioti DK40 open station, and didn't know what I was missing without a cab. My tractor went into regen at 13 hours.. and it was a simple 15 minute process. I was moving some logs and the light came on the dash. Shortly thereafter the other light came on (there are 2 lights... 1 that indicates it is ready to regen, and the other indicating that the engine temp is high enough to regen). As soon as I saw the first light, I cranked the rpm's up to 2,200 and kept working. Both lights stayed on for about 15 minutes, then they went off and it was done. Did not affect me in any way whatsoever. I did notice a different smell from the exhaust, but that's it. Nothing to be afraid of. They are constantly improving these tractors, and in my opinion the MT3 series tractor is very well made. This is however on a tractor with only 14 hours, so it's not broke in yet. I plan on giving more reviews when it gets a few hundred more hours on it. Main thing is, periodically check the important bolts and make sure they aren't getting loose (lug nuts and loader mount bolts), stay on top of your fluids, use proper fluids and filters, and run your machine at 1800 rpm's minimum most of the time, and you will be fine. These tractors have a 2 year bumper to bumper and 6 year powertrain warranty. That's pretty solid. If you have a good dealer nearby, don't hesitate.. go for it! You certainly won't beat the bang-for-the-buck!