Not the worst but definitely not the best

Your first experience with Hess is the training which is everyday for one week and change. It is generally not that helpful because it is not specific to the place you will be teaching at which run however the manager feels it should. The degree to which the contract you sign and the policies outlined at the main office are followed varies a lot from branch to branch. In my experience many branches underpay for events. Also I have had a few "accounting errors" which surprisingly have never been in my favor.

Hess generally pays less than the going rate for teachers. They also expect you to do a lot more work outside of class than other jobs in Taiwan. You may have a little leverage if you complain depending on how many teachers have quit recently, but usually managers are willing to fight for pennies from you no matter the long term costs.

They have a main office staff of foreigners but they don't have the power to really help you. They seem well meaning enough though, and they will at least listen and then tell you to talk to someone else.