Not bad. It is of good quality and durable. It doesn't need engine oil, and it won't produce oil pollution when it is used. It's clean and doesn't need to be plugged in. It is convenient to carry when going out to saw trees. The chain is extremely sharp and the power is very strong, which is very easy to use. The advantage of hand saw is that it doesn't need electricity and petroleum energy, but it can be done because it can't be put down. The disadvantage is that it is tired and difficult to use, and it has to be able to file and repair saws. It can accurately cut articles without making a lot of noise, and it can be bent and cut at will, which is safer.