Simple, unexpected and perfect!
Why - very simple: these people are reliable, as well as their products. I tried them first time via Kickstarter, when they announced the universal LiIon 18V batteries and the adaptors for Makita and Milwaukee - both favorite brands in our company. So it is much easier for us to use CEENR batteries that fits almost into all our hand tools - a simple, great and convenient idea. The are handling customer complaints (in our case they were out of stock for our batteries) on time with a minimum of response time, regardless of the time difference (must be about 7- 8 hrs. in advance to Europe). The delivery time for new parts are very short (less than a week) - we will see how long the batteries are lasting - right now we are very satisfied with the overall experience.