My 6210 started showing condensation behind the touch screen, but only in cold weather with the unit on the bike - I tried and failed to replicate the behaviour by powering up and putting the 6210 in the fridge !. Took a picture on a cold early morning run showing the condensation, to explain the problem to the sales staff.
Anyway, after 6 months of ownership, Maplins have exchanged it for a brand new one, no hassle. (now with the latest V7 software).
I'm glad I spent a few quid more with a high street dealer who I can go and see the 'whites of his eyes' if there's a problem, rather than an anonymous E trader. Imagine the hassle with comms and postage I might have had trying to do this exchange with an E trader? Is it worth trying to save that last ten quid ?
Regards,
Graham