Given how cheap it is at the moment, and that my car is now over 9 years old and possibly never had it done, I thought I'd pop down this afternoon and gt it done. Took about an hour, Ill lsit the results from the printout.
TEST RESULT
REFRIGERANT: R134a
RECOVERED
00.635kg
RECOVERED OIL
0002ml
VACUUM TIME
020:00min
LEAK TEST
No Leak Detected
CHARGED 00.740kg
OIL CHARGED
0012ml
Not sure if the numbers are good or bad....I guess its lost 0.105kg of magical cooling gas. The vents felt bloody cold when I got back in but its hard to tell how much colder as Ive had them set to warm for the past few months and Im too much of a pussy to go and sit in the car in weather like this to see if it can get me any colder. The real test will be to see if it keeps mist on the glass at bay any better; it has had a bit of trouble demisting the windscreen lately. Still, for £25, any improvement is welcome.