Has anyone used this company for airport parking in manchester
Don’t use them. Don’t use anything but the official ones, ever.
They seem to have "interesting" terms & conditions - especially about your own car insurance. And you pay in cash.
GIven all the cowboy companies (that the council & trading standards seem unable to stamp out) that advertise various parking services for airport passengers, I've never chosen to park my car with anyone other than the "official" airport parking as linked below. And they often send me discount codes - this one expires midnight tomorrow MAN0813ALL
(I've never used Hunters so cannot say whether they are ok or are yet another cowboy operation).
I personally wouldn’t risk it, even if it’s cheaper. Pay more, go official parking, it’s worth the extra. Your cars too valuable and you can go away without worrying.