I've got mine and painted them. The dice are well designed and have a good feeling. They are a tad lighter than regular plastic dice I'd say. The intricate details of the surface makes it quite challenging to paint and I had to learn that water based wash for shadow highlights isn't working well with the strong & flexible material because it's quite porous. Regular miniature colors worked well otherwise.
The numbers could be a bit thicker for my taste for the D4, D12 and D20 - some digits weren't as flat as others and I suspect that the design is challenging to print since it's requiring a very high resolution. The walls of the numbers are sometimes smaller than .5mm I'd guess, which is very thin.
But in the end, a very solid design, well done!