Rating: 2 stars

The fact that the free plugin relies on two commercial products that have no open source equivalent makes it hard to evaluate without incurring charges that are prohibitive.

They also disclose that their xAPI companion plugin is a paid product at the bottom of the Experience API for Sensei LMS by GrassBlade plugin page hidden in an answer to an FAQ… they could have mentioned it.

It sounds interesting but due to the constraints of requiring paid products, I can’t really use it or recommend it to others