Any opinions or thoughts on if any of them are better than the other ones?
well, now I go to SIGMA
really like the material, the way it's taught is nice. also, the interaction with students by the tutor is good (and they're also very easy to interact with unlike other places i've been to)
for the other two, i dunno.
ACE booklets look pretty but 3 hour
classes for physics seems a bit excessive (friend trialled and also agreed).
a ton of NSB seem to go there, i've seen a bit of the booklets but really don't know enough to judge, sorry
Personally, I would pick Sigma bc of all the perks it offers (I did online once and it is not as
interactive but whoa, it still felt more interactive than other places in person and is such a nice vibe to be in bc the enthusiasm from the tutor really carries over to the student lol)
Sorry for the very late reply though