CW just about covers it as far as I can see. I confess that I don't get involved with costings/discounts/credits - I just leave that to the bean counters, while I get on with delivering training.
However, I doubt that either ourselves or Oxford will let you down in terms of training provided or the financial security to see it through. Depends if you want to drink expensive beer while watching Coronation street (hiding from rain) or cheap beer while sitting in the sunshine on a lovely March evening!
Your call.