I love testing products that promise to be long-lasting, especially when it turns out to be true! The Wonderlast Lipgloss is a long-lasting lipcolour, they call it a lipgloss but it's kind of between a lipgloss and a lipstick. It's as pigmented as a lipstick, but can be as shiny as a lipgloss (if you skip the second step your lips stay matte). Here's what Sleek has to say about their product:

A combination of a highly pigmented long-lasting colour and a moisturising clear gloss with non-sticky, glossy properties.
The dual ended product will provide the lips with a medium coverage of colour and shine.
First apply the long lasting coloured pigment, leave for 45 seconds to dry before applying the moisturising clear gloss. The top coat (clear gloss) is used to seal the initially applied colour onto the lips making it last much longer and lock moisture into the lips.

On the packaging they remind you to apply step 1 first (in case you might get confused?) followed by step 2. However, the 'few seconds' they mention could be a bit misleading, because you definitely need to wait a bit longer than that. On their website they speak of 45 seconds, which is what I'd recommend.

Okay, time for some lip swatches! The first picture shows how 'step 1' looks on the lips, you get a nicely pigmented lipcolour that stays matte. It feels a bit drying, but luckily you can fix that when you add 'step 2'. I also added an 'after 2 hours' picture to show that it's pretty long-lasting (you only lose a bit of shine). Although even this product won't survive a meal/drink, 50% will stay in place and the other 50% will disappear. The last picture shows you how it looks when you apply a lipliner before you use the Wonderlast Lipgloss. Doing this makes the product less drying for the lips, although it does affect the 'final colour'.

A full face picture with just 'Step 1' on my lips, I just love how the colour looks when it's matte! Overall I think that this is a very nice lip product, and I definitely want to purchase more shades. I don't mind that it doesn't survive a meal, it still requires less touch-ups than all of the other lip products I own. Mine was a gift so I'm not exactly sure what the price is, around 5 pounds I believe? Sleek products are  not super expensive, and this lipgloss is definitely worth it!