Ordered this as showed basic selection of colours. Gel distributes evenly through roll out icing. True colours as light or as vibrant as you choose. The pink gel doesn't go a bright pink, but it was fine for my 'Peppa Pig' characters. I used the gels' also, as you would use paint, to highlight these characters once the shapes were cut out, mixing the colours on a saucer to get different shades. Doesn't run into rest of the icing.
There is a warning on four of the bottles regarding 'having an adverse effect and attention in children'. To be honest, unless you have a child that will eat lots of icing, I wouldn't think it would do much, BUT IT IS SOMETHING TO CONSIDER!
I've used pastes before, but this gel is easier to use and will go a long way.