A nice mix of colours - 50 sheets colour one side and white on the other, the other 50 sheets 2 colours. Reasonable thickness, folds well, pleasant to work with. On the downside, the sheets are not particularly square - sides can differ in length by 2-3mm, corners are often not perfect right-angles - which can make accurate folding more difficult. The precise combination of angles and lengths of sides also seems to be very difficult to correct (I can cut a more accurate square out of standard photocopier paper than I can trying to correct one of these).
That said - this pack is very cheap compared to others, and I think it is still a good deal. I'm about halfway through the pack now, and expect to buy another when I finish it.