I did medentry, and I do recommend it, but I'm pretty sure there are people out there who did use medentry and still didn't do that well... so it depends.
I do think it is helpful to familarise yourself with some of the questions, I know some of the questions (about 3) on the actual UMAT were the same ones from the course... I was like SCORE free answer
. However that said, the reason my score was jacked up was because I did really well on section two (98%) and that pulled me up. I didn't work on section two whatsoever though... just me...
I got 175... I would have liked 180+, but never the less I have two interviews
but actually use it, and start using it early too, because as soon as year 12 really starts going you will have no spare time