Hi
we usually park the car and get the bus, but last trip i didnt fancy waiting around for the bus to take us back to the car or lugging the luggage around.
we used this company instead (Forgot the name!!)
the phone number is 0161 474 0991
They ask you to park outside the terminal, they park your car, and when you return from your hols, your car is waiting just outside terminal for you!
I thinkwe paid about £72 for two weeks. which i thought was quite good, as its nearly the same as the park n ride.
hope this helps!