I am in general fascinated by software where you get non-obvious output from simple input. I would like to try this for employee rostering. My main reasons not to is an abundance of soft constraints (Mary prefers Fridays off, Lucy prefers her days off bundled together) and the fact that I live in a small country with small organisations where I am unsure of real benefits compared to manual work.

As an aside, vehicle routing is a lost case here. We have few main roads along the coast and across mountains, nothing like the grid roads of central US. Vehicle routing is obvious here, no need for software.