General advice on looking into the loan of a new horse?

I would try her out. TBs get a bad rap sometimes because they are taken off of the track and pushed to hard and expected to know too much. TBs are generally not hot horses and have good minds. I would rather train a TB than some of the little fireball quarter horses out there anyday. They are sane, intelligent and willing. Give her a chance. If she is putting up with a complete beginner she is probably a great horse, I mean he obviously keeps riding her and he is still alive. Good Luck!