I haven't used this. I have a 100 degree. I think it's good. It suits me very well. But in other words, judging whether something is good or not is really mixed with too many personal emotions. So when choosing, it is best to choose more and listen more. Choosing the one that suits you best, after all, costs money, and it is not easy for anyone to make money. There are many live classes now, and 100 education and * * are not bad. Suggest shopping around.