That landing page looks right out of Bret Victor's time travel demos (https://www.youtube.com/watch?v=EGqwXt90ZqA, or http://worrydream.com/LearnableProgramming/). Communicates the value instantly. Incredibly well done!
IMO the most time consuming issue in triaging bug reports is reproducing them. Replay definitively solves the "can't repro this" problem.