RTC SE is ( sorry Boxy) probably the best RTC in terms of passes at CIC / Special to Arms training. Its most certainly the biggest, with up to 200 SuTs on weekends. You'll be very busy there, and not just polishing mirrors / pointing to the gym.
You'll find your skills as JNCO being developed very quickly, as well, given the workload / throughput.
No worries, we're the best in Scotland.......we just couldn't deal with 200 SuT at once which is why SC11 is going to be amusing.
Life at an RTC is hectic but very rewarding and as BB says you'll develop your teaching and man management skills very quickly. You'll have more responsibility, for your rank, at an RTC than you'd tend to have back at your unit.
So long as you don't play the "Great I am" you'll get on well.
I've done some time there as a guest instructor. Its a good unit, but if you want to now the down side the accomodation is bloody awful, the food terrible (worst example of PAYD I have expereinced) and although every other weekend seems easy it can become like goundhog day, waiting for the weapons to go in on Sunday can take a bloody age so you get away late on alternate weekends.
These are small almost insignificant downs to what is a pretty good career experience. You get unprecidented access to courses, meet staff from every TA unit from a wode area and the recruits (sorry SUT's) are on the whole a pretty interesting bunch.