I bought a CMF1 phone and flashed /e/os on it. Mostly just to run it through the ringer and see how well it works and if it really can be a daily driver. So far, so good. Phone was on sale for 125€ during the last Black Friday. Surprisingly good phone for that price. Been using it with the various privacy focused messengers for voice calls. Haven't stuck a SIM card into it yet. Eventually I'll try my banking apps, which might be the sticking point as I'm not sure I can get those outside the Google App Store.
Work in progress, I guess. But no problems so far.