The suction cups keeps (still) quite good. Although for the TomTom Via series designated as suitable, and the suction cup with 60 mm should fit on 70 mm - one would have the two tabs of the suction cup (or at least one of them) cut to bring the device into the suction holder. If you have done that, sooner or later stand out as one nipple and falls down the Navi ...- do not think that in the 80 mm disk works much better, since it then here are the instructions that the adapter plate to solve at a higher temperature begins ... With a Mazda 5, the central ventilation slots are also very small in order to try to maybe more appropriate Vent Holder ...