If you’re going to be working at Hess, I assume they will furnish you with a work visa, which means you are not reliant on MTC to give you a visa by virtue of attending class there.
So, I would advise you – don’t!
(Don’t go to MTC, that is.)
The other language centers (apart from the former Flag, that is!) offer classes that are just as good in quality as MTC. The teachers at MTC do their best, but they are not any better trained than nearly anyone else teaching. I’ve studied at most of them (MTC, 2 TLI centers, CLS, but not Mandarin Daily News “Guoyu Ribao”) at one time or another, and they’re basically the same. It depends on the luck of the draw in terms of your teacher, and then on what you are personally going to put into your studies.
Before people get going on me, by the way, I have a Ph.D. in Foreign Language Education with a concentration in teaching Mandarin Chinese, so yes, I do think I have some basis for this opinion.
Save yourself some money and go to a smaller center. They’re more flexible, cheaper and usually more accomodating. MTC was better when there were only 200 students or so, but that was back in the 1980s…
Just my NT$1