Superb tool!
In 15 mins, I was able to get rough answers to questions like:
* When am I financially independent if I keep living the way I do now?
* What if I lowered my expenses right now seeking earlier FI?
* When could I hypothetically stop working by lowering my expenses at the point of retirement?
* How much would be left in my estate?
I bought the lifetime subscription, which seems like quite a good deal!