Bring a formula revision, supplier evidence, trial observations and stability/compatibility results. Ask whether another formulator can retrieve the reasoning and identify the exact tested composition.

Compare recording effort, search, permissions, method/result review and handover ownership. A notebook can preserve useful research context; a LIMS can control sample/testing work. Choose by the workflow, not by assuming either category stops being useful.

The other cosmetics-specific test is what happens when a trial becomes a product. The composition moves into the safety assessment, the specification, the label and the notification. If it moves by copy and paste, every one of those documents becomes a place where the truth can drift.

Ask to see a trial promoted to a released specification, then ask what the PIF looks like immediately afterwards.

We're the right answer where development, safety assessment and notification are one continuous chain rather than three handovers, with Willow checking restrictions as the formula changes.

We're the wrong answer for discovery science with heavy analytical instrumentation, and for consultants formulating for many unrelated clients who need a light standalone tool.