I’m about 3 weeks into ownership of a Creality Ender 3 S1 Pro. So far so good, apart from stuff falling off the bed! Tramming your bed (“levelling” is a misnomer) is vital to make sure everything is parallel, but you engineering types already knew that didn’t you! Make sure you preheat the nozzle and bed before you do any tramming or auto-levelling, to account for any thermal expansion.
Yesterday I had a delivery of PETG and TPU to try, after getting started with PLA. I also bought some cool two-tone PLA but like a moron I bought 2.85mm stuff which doesn’t fit my machine. Live and learn.