I thought I'd share this with you, in case you have a tomtom GO.
I think it works quite well and avoids the window suction thing.
The clip is a Broadit Mount Holder (£20.90 inc postage) and is secured with 2 cable ties. (I've got one in the S Type too)
It's not up there with OEM obviously but works well, (some restriction on the movement of the vent but I can always use the one on the RHS in summer.


