As a previous user of quickcheck and now user of proptest, I can say that proptest feels much better to use because it doesn't tie quite as directly to a single type (as a sibling comment mentions).

With quickcheck, I had to define `MyTypeWithAnOddOffset` and `MyTypeWithAnEvenOffset` (or equivalent formulation) and composing things was tedious or hard.

With proptest [1], things flow much nicer.

[1]: https://github.com/shepmaster/jetscii/blob/2b1039a9fb8d8ad9c...