I have had mine for about 12 years. Never had a problem and it has welded everything I've asked it to, including some deep cracks in my Bobcat lift arm that required heavy v-notching and multi-pass welds. If you are planning to go portable with it where 240v power might be hard to get or if you will almost never weld 1/4 inch or thicker stuff, the Handler 140 is a great machine. If you have 240V power readily available, I would suggest stepping up to a bigger machine for those few times that 1/4 inch penetration just isn't quite enough. Remember, nobody ever wishes they had bought a smaller tractor. The same is true for welders.
