Just finished using Cornertape(6mm) to silicone my newly tiled bathroom.
I'm very pleased with the results. The product was simple to use and the yellow plastic tool (included) helped to provide a smooth joint.
I did find I wasted a bit of silicone as I tended to overload the joint with silicone as I knew there was no chance of overspill because of the silver masking tape. No doubt with with increased use I would be able to be more efficient with the silicone. At least the excess found it's way onto tissue paper rather than a mess on the wall!
Big Smudge - Are you getting the product into the DIY sheds or even Screwfix?
Reading the replies/ between the lines is it seems half the battle with pushing it to the pro's is it is almost an affront to their abilities
Anyway, best of luck with it .... innovation that works well deserves out support