I used to use Repti-bark, this is the first time ive used aspen and i dont think ill be going back. In my opinion the bark looked nicer but aspen seems just as good, and you get more for your money (a £5 bag of repti-bark barely covered my small tank, a £3 bag of aspen covers my tank deeper and still has enough left for me to spot-clean for the next few weeks atleast.)