I think it’s the first time I’ve paid money for a developer tool in ages, but it seriously is amazing. Reduces test turnaround time by a LOT, and it’s almost instant feedback when you write tests. See the above video, it totally changes the way you write tests, and you end up writing way more of them.
It is quite expensive though: here’s what it costs in India:
This policy is honestly brilliant. So many commercial tools have this artificial work use or personal use distinction.