Earlier this year I had one brought to me, a 12 ga, that wouldn't fire. I removed the firing pin bushings, the firing pins, and springs, cleaned everything up, reassembled it, and it began to work. One complaint I've heard is that the pivot pin is soft, and overtime a space develops between the barrels and receiver. I don't know what would be involved cost wise with replacing the factory hinge pin with a harder one, but silk purses and sow's ears come to mind. Some people might object to extractors rather than ejectors, but on a low cost gun, an extractor is probably more positive and reliable. On the example I worked on, there was significant difference in the feel of the triggers, but I wouldn't call either particularly good.