Can anyone give me an idea of what the shelf life is like for the working solutions of the chemicals in the Rollei C-41 kit last? Is it like B&W chemicals in that the developer has a limited lifespan, but the bleach, fixer and stabilizer last a lot longer?

Rollei's documentation says that the concentrates last a very long time (help here would be good too), but it doesn't say anything about the working solutions.