Whilst at Coleraine, prior to joining the RAF, Mrs WhiteOvies was with the Artillery TA and had an extremely enjoyable time. Training was excellent and gave her a lot of confidence prior to IOT. She also spent a significant amount of time parachuting from mil aircraft and meeting lots of interesting people along the way. A great way to broaden your military experience and it will give you an understanding of the guys on the ground whilst you are flying above them (hopefully).
The extra money helps for a student but like all these things (OTC/URNU/UAS etc) you get as much out of it as you put in, so crack on and enjoy it.