Hi onekeano,
It depends on your daughter really, and what kind of student she is. The Institute is great for last minute revision and year long courses, but there is a huge temptation to doss on the revision courses, so if she is the kind of student that needs supervision or guidance, then 121 is the way to go.
I speak from experience, having a (much) younger brother who wanted to do the same thing this year, but when left on his own, he can barely motivate himself to get out of bed - never mind apply himself to a 90 minute long class!