As far as work environment in army pre primary school are concerned I feel the place ,people n ambience all is very conducive for self enhancement.
Regarding pros n con ... i see lot of positive things from where you can learn a lot ,lot of opportunity where you can show your talent n creativity n place where you can grow ....the cons what i feel is as its part of army fratenity lots of visits keep happening n this disturbs the normal working of the school ....
Any place to work within army is very safe.
Best part is you'll learn a lot from these schools as the crowd that you'll get to teach will be from all over india. Your creative side will benefit a lot in order to keep your class happy and engaged. The only demerit any one will find is the salary structure. Since it's a welfare scheme of army, the salary will depend directly on the income of that school .