Don't risk it - Avoid

Hess will give you a good training in the basics of esl teaching. They will.always pay you on time. The kids are great and some of the branch staff are friendly. They paid for taxi from the airport
Helped find an apartment, Good way to meet new people.

HESS takes advantage of foreign teachers in a weak position. You will spend more than half of your time doing completely unpaid work. The amount of extra "activities" are frankly absurd. You will only get one day off per week. Expect 50-60 hour work weeks but only 20-25 hours of pay. There are ZERO paid days off. None. And it is very difficult to get time off because you, the employee, will have to find your own subs.

HESS does not hesitate to use scare tactics to unsuspecting foreign teachers. For example, threatening to fire you to get a "better performance" (even if they have no intention of doing so). Keep in mind that getting fired also means losing your residence visa!
Last thing to say: HESS recruits entirely from abroad. This is because their reputation is so bad that NO teachers in Taiwan are willing to work them. None.