As requested, here are the swatches of the Sleek palettes...Very few matte colours: the black (top row 1st from left ) in the Original, a beigey-brown (top row 3rd from left) and a dark brown and black (last 2 from right) in the Storm, and another black in the Sunset palette. You can easily tell the difference from the non-shimmery look. The texture can be a bit particle-like when you first pick up the colour. I think it's because of the waffle-like texture it's pressed in. Otherwise it's really really smooth when applied.
So, are the swatches enticing you to get any?