abit of a late reply, but for the VCEer of next year, who's going to do the UMAT, i would recommend also MedEntry
i went to them for their workshop during one of the school holidays with a few friends as they offer group discounts.
i found that the materials (most, if not all, online) they provided are very close to the actual UMAT papers.
you also have access to an online program (called eureka if i remember right) which generates endless amounts puzzles similar to those of section 3, and after you've attempted one it will give you the answer and how it was obtained.
you also have access to 10 full length trial exams (3 sections per exam) and about 20 x 20minute drills for each section of the UMAT. and each section of divided into smaller sections (for example section 3, theres "Pick the middle, What comes next, etc...).
for anything thinking of going to MedEntry, i'd recommend they make a plan for the drills and the practice exams, as i was stupid enough to leave everything to the last minute and only managed to finish about 5 of the 10 practice exams.