its your money but the £4.99 ones are brilliant never had any problems with mine in 3 years the airline at work is checked every 6 months and i then check the halfords one against it and its always been spot on
cheap and cheerful yes but it does what its designed to do
Bugger.
Oh well,the Amazon order is now winging it's way to New York so I'll go with that.
Ta anyway.
