I don't know! Each family has its own characteristics! But it is not perfect, there will always be advantages and disadvantages. There are too many factors to consider in ground training! For example, does your class time conflict with your working time? What is the distance between the location of this training institution and your location? If it is too far away, it is estimated that it will delay your normal work or study time! So I suggest you consider online education and think of Loki English.
There are special one-on-one telephone consultations and free oral proficiency tests. The price there is also quite transparent, and teachers are more lively in class, not as rigid as schools. And online learning, as long as there is a computer that can access the Internet. You can attend classes, regardless of time and place, and the price is acceptable.