Not regretted it for a minute! What you are paying for is the fact that you can plan when you want to have treatment and not be screwed around by the military!
The catalyst for this? Waiting 23 weeks for an 'urgent' scan at the local NHS hospital when it would have taken 1 week privately. You have the mother of all examinations and letter writing when you a being referred to a private consultant (bearing in mind my PME last year took all of 4 1/2 mins). And it covers you until your 65th birthday.