The two reasons I chose Round One were: (1) their track record, and (2) their personal character.
Regarding the first point, because essay counseling is an intangible service, I believe that past results are essentially the only reliable way to judge a counselor’s capability. In that respect, Round One gave me confidence, as they produce admits to nearly all top schools every year.
As for the second point, I had heard stories of applicants switching counselors due to poor compatibility, which made me believe that personal fit with a counselor is extremely important. On that front as well, I felt very reassured after meeting Mr. Round in Tokyo for the first time and experiencing his calm, sincere, and trustworthy character firsthand. In addition, the consistently strong reputation he had among senior colleagues at my company and instructors at the English conversation school I attended also played a decisive role in my choice.