Mapei 201 Crystal Moon FlexColor 3D Pre-Mixed Grout

I like this product, and I'd buy it again. It is expensive, and I think Mapei try too hard to hype its properties. It's slightly 'iridescent and sparkly', but I wouldn't recommend buying it just for that reason. For me, the real benefit is, it works well with glass. I think conventional grout overwhelms glass, and you tend to see the grid of grout, not the beauty of the glass. This product is slightly translucent, to it refracts the colour of the adjacent glass, and allows the glass to retain its three dimensional appearance, which I think is lost with conventional glass. Very easy to use. Lots of cleaning needed, as with any grouting alongside glass. Not five stars due to price and the 'sparkly' hype.