and here's an example using watercolour in the cheap sketchbook.
Watercolour sort of fades into the paper and doesn't stay clear and crisp, I had to go over this several times even to get it to show up at all. Plus the paper felt like it had a 'scratchy' surface to paint on. Why did I buy it - well the obvious is it was cheap in the first place. So why didn't I avoid it - trouble was it was packaged up, so I couldn't feel the texture of the paper before I bought.
With this next sketch, you can see how the paint fades...
There is always an upside to these things however. I get to use this sketchbook now for ideas, quick sketches and warmup work....win win.