The GPS suction mount works very well on this disk's smooth surface.

The GPS suction mount works very well on this disk's smooth surface.

I will say that the suction cup holds extremely well to the top surface, so if you have a hard, flat, smooth surface you need to stick this to, it might work ok.

The top surface may be easily scratched and so may not last long.

They fit on the suction cup but the sticky surface would not stay on the dash.

The directions told me to clean surface with an alcohol pad which i did and the thing didn't even stick

, I purchased this attachment disk to provide a smooth mounting surface on the dash where I wanted to mount the GPS

The top surface may be easily scratched and so may not last long.

line summary: Smooth mounting surface is excellent; 3M adhesive was excellent on our textured but flat dashboard

So the actual smooth surface of the disk is a bit smaller than the actual width of the disk.

I will say that the suction cup holds extremely well to the top surface, so if you have a hard, flat, smooth surface you need to stick this to, it might work ok.

while the disc IS 70mm, the ACTUAL USABLE surface is only 64mm.

this works perfect when you need that smooth surface for your suction cup mount

It needs a thicker foam adhesive to conform better to uneven surfaces

The tray is ribbed and I was concerned there wouldn't be enough surface for the glue to hold down and was particularly worried that the sun's heat would soften the glue

This product will work as the original was discontinued