There is a thread where people have left feedback since September last year. Note that the firmware has been updated several times since then. Last version is about a month old.
A lot has been about random disconnects since the script seems to be loaded like streamed video i.e., in smaller chunks or something, instead of the whole script at once. Changes in how stroke lengths and speed limits are handled and a more mechanical feel are other things being commented on. People really like the fast server connect and super fast loading of scripts though.
This update is available for early access via the Staging feature flag branch on https://new.handyfeeling.com/#/ota-optin . If you want to try these changes, you can opt-in there and test the improvements.