Yup, as Arty says, watch out for 2015 - new pension (FAFPS) and new terms of service (NEM)
may make PAS a far worse deal than it was in its heyday.
The PAS deal with AFPS05 was scandelous and completely screwed up the rank/remuneration structure. You had Flt Lts retiring on Gp Capt equivalent pensions and then others that had advanced to Sqn Ldr and then Wg Cdr retiring on less. The last bits of big FRI was reserved to entice aircrew who got promoted and to make them stay in past 16/38. If PAS is not such a good deal under the new pension scheme (FAFPS) then the problem will be sorted.
"Buyer beware" is all I can say.