A few things ...
1. Unless you had something, literally in writing ... I wouldn't trust that 19 guarantee. It's seriously too low, and I'm not sure if ANYONE could even guarantee that. Even if it was the director of admissions ... he'd probably at least have to explain himself and unless you guys have the same last name, it could get weird.
2. BR is seriously legit. It helped me far more than anything else, especially physical science. I took the MCAT twice - once with a big Kaplan course which really didn't fit my learning style; did ehh, alright. Once with much, MUCH less study time (less than you're using now) and BR for PS + Kaplan/EK for Bio + a tiny bit of EK for verbal ... did quite well. Biggest jump was in my PS.
3. There's really no reason to get that low. What if you don't end up going to that school??? Now you're stuck with a bad MCAT score and limited options.
My advice ... if you have the time right now - study hard until June, and take it. If you don't have the time ... make the time.