[BORBRYCE]

I'v just bought some, they look a bit dodgy. How fast can you go before they fly off?  Got them from Vistaprint.

[andyM]

I've done over 60 mph with some I had from Vistaprint quite a while back. I don't use them anymore but they did the job and never fell off. 

[colin purewater]

had the same ones a few months now never a problem on motorway mate
just make sure you dont get any kinks in them they wont stick very well after that

[richard jagger]

Make sure there is no grit under the sign as the grit will were through your paint work.So clean the serfice you need to stick them on before fixing

[dazmond]

I had some from vistaprint.cheap but small.did the job.never came off.I've now got ones from signbuilders.a lot bigger and better qualitystick better ad well as bringing in more work!