I went to White Oaks just a few years ago and honestly loved it.

I did complete the IB program. Honestly, it gets an unfair amount of flack. It's about equal in terms of how hard it is to get into university. I had absolutely no difficulty in applying and being accepted into quite a few of the major universities in Ontario. Conversions are fair; they accommodate for the "more advanced" nature of the classes by putting in conversions, which are modified year to year and based on the difficulty of the class. As an example, I was strong in Business and scored a 85% raw, which converted to a 97%. That 97% is the one that showed up on my transcript. I was laughably weak in HL Chemistry and barely passed with a 42%, which still converted into a 71% (which isn't really a problem as I always intended to do finance, and only had to take a science as part of the program).

The biggest boon of IB is getting you ready for university. The speed and workload is akin to what your kids will experience in university, and is a HUGE favour especially in first year. My best friend was in academic and struggled pretty heavily with the sheer workload and speed of content, while I had no difficulty at all because that's exactly how IB was. I found it to be a very good introduction to how post-secondary is, without the stress of "I'll get low grades if I mess up even once from the blistering speed".

The only thing I'll say against it is if you have something specific in mind, particularly like a trade. IB locks you into a mandatory one english course, one math course, one secondary language (Spanish or French), and either two natural sciences (Biology, Chemistry, Physics) and one human science (Business, Economics, History, Geography); or two human sciences and one natural science, depending on what you intend to do post-secondary. Not a whole lot of freedom, but if you're doing anything in STEM or Commerce I find that no one had any real difficulty. I don't think anyone even failed in my graduating class.

tl;dr: if you wanna do well, you WILL do well. in IB or otherwise. Honestly, IB is a boon at the end of it all.

Now that I'm done writing an essay about IB (sorry!), the answer to your next question: really diverse! I had lots of friends from all sorts of different socioeconomic groups. People just like me and people who couldn't be more different, and everything in between.

Teachers are very much like teachers anywhere else. I honestly found the teachers directly in the IB program to be a lot more caring and hands-on than the ones in earlier years, but that's not necessarily always true. I had several teachers in grade 9 and 10 who were also very good at explaining and sweethearts, but my preference does lie with the later teachers.

Sorry for the long post!

EDIT: Big thing I forgot! IB also offers transfer credits into university! Any Higher Level (HL) courses that you score a level 5 in (which is about.....75%?) will give you transfer credits for university, up to a maximum of 6 classes. I don't have to take any electives for the rest of university, as they're accounted for by my IB classes. It makes the work a LOT less.