I just bought a set today too, Screwfix. Worked out a lot better than my finger would have. The only grief I had was with the grout between the tiles. A tiled wall above a work surface, as I went past each line of grout a bit of silicon was forced up there, seems to peel off again when partially set though. Now looking forward to re-doing the seal around the edge of the bath! Sad the things DIYers look forward to doing eh?