Tested under heavy showers, my Tomtom 930 escaped unharmed despite some traces of condensation in the Case. (However, it is a bit hidden behind the bubble of the 1200RT.) Most: - No annoying vibration. - Easy adjustment of the support with the ball. - Good visibility even if it should not be too demanding in sunlight. (That's not terrible without the case) - Opening for the passage of the cables is therefore suited to the middle Tomtom - We can always manipulate the Tomtom through. (Even with thin gloves) - Very easy to remove the support and for me it has never dislocated wheelchair (I still insured with a little cord.. - Well suited to Tomtom Size, ensconced keeping the foams 3 without cutting. Cons: - Some condensation in heavy rain, to see what it might give less sheltered on the handlebars of a roadster. - The little plastic lever to remove the case of the support seems lighter if we must use it often In conclusion, this product is very convenient for occasional use (quickly mounted or unmounted) has an interesting price for a motorcycle stand.