Very Good
What did you like?

The receipt-backed model is a nice trust signal — knowing failed renders cost $0 and getting proof metadata makes it easy to test before committing real budget.

What didn't work well?

Being in private alpha with seeded GPU lanes (dual RTX 3090s right now), queue times could get long once more people start uploading heavier scenes.

What could be better?

Clearer upfront guidance on expected render time per scene complexity would help — right now it's a bit of a guess before you upload and get quoted.