Biggles, absoloutely and I completely agree with a lot of what's above.
I got to 23, out of uni for a couple of years, had done loads with the TA and was enjoying it. Had a good job.
But I just thought....this is all fine but would I regret not joining when I'm 30.....too right I would and I made the decision. Best thing I ever did. I hated a lot of Sandhurst but it had to be done and it's all been worth it. .
As someone once said (cheesy I know)......
'Regret what you do do not what you don't do'
If you do decide to do it, grab it with both hands and go for it. Don't do it half heartedly, you'll never feel happy in the military if you do.