I've been using the CPWI driver since I bought my mount in April. This morning while trying to use pempro for the first time I tried the unified celestron driver for the first time as pempro didn't like CPWI.
CPWI puts my handcontrol in bootloader mode, rendering it useless for control and needing a power cycle to get it out of boot loader mode. Quite annoying. The unified driver didn't put it in boot loader mode so I could still use it while connected to pempro and phd2.
I didn't get to train pec as the smoke and clouds snuffed out my stars.