Girls girls...you're both pretty!!
Everyone is entitled to their own opinion and I think sometimes opinions, especially on this forum, can be taken out of context.
To the OP: What I suggest is filter through the comments and take away from this thread what you can.
I know instructors from both Learning Curves and RTI. I don't know much about Humber.
I've taken both my M2 exit and M exit course from RTI, from my experience, here's my opinion:
-I find the instructors very knowledgeable and have a lot of experience to share
-I found that the M2 course gave you a good base to go out on the road with
-Personally, I tend to overthink and overanalyze things, so 2 days on course in a parking lot (which is standard for M2 exit) was not enough for me, but again, it was a good base and good starting point
M2 courses for the most part as a n00b, when you don't know the difference, well you don't know....know what I mean jelly bean?
Basically what I'm saying is, I feel that Learning Curves and RTI both teach and provide you with a great learning base. All the basic maneuvers, techniques and general rules to remember are drilled in for 2 days.
I think the main difference between both schools is just the "style" of teaching. Learning curves has a bit more relaxed, friendly, fun, social environment, while RTI who is still fun and friendly, has a bit more of a traditional teaching style. They seem to have a more rigid teaching format.
RTI and Learning Curves allows you to take free re-tests if you fail the first. Both are conducted in parking lots (this is likely due to legal and insurance restrictions), I can't comment on the amount or variation of bikes, it's been a long time since I've taken my M2 course.
my personal opinion on how you should choose between schools...price, time and location, I feel the limited amount of schools we have left out there have been around for a while and are good at what they do. Whatever you take away from the course is up to you.
Hope that helps.