It is holding up great, I don’t do much heavy stuff with my phones these days so mine is basically all stock and outdated (i do keep meaning to put something custom on there) and it is just fine for day to day use. For example, youtube videos, reddit, web browsing, music playing and maybe some light gaming is I am bored and caught with no better options., I put quick notes on it and shopping lists, I use it for Discord video calls and taking the occasional photo (though the camera is definitely showing its age but for unimportant stuff it is just fine, the front camera is really not great but works absolutely fine for the video calls), some messaging on various platforms and as my alarm clock I think that about covers it for my use.
It does all of that with out any problems and the pen is still nice to have even if not used frequently.
The only real complaint I have is the default software is surprisingly limited, like no torch application for some reason or readily accessible calendar (the is one on there but there is no way to get to it) and stuff like taking a screenshot is frustrating as they disabled the usual Power Button + Volume Down combo in favour of their gesture system which makes you palm swipe left to right which is not always detected properly and will frequently scroll the screen or zoom it or some other weirdness you don’t what and maybe also take a screenshot which mess it all up and the screen moved. All of this can be fixed with a custom android rom and that is probably recommended as it is stuck on 5 for the stock one.
Oh one point worth mentioning since we are talking batteries too,
The NFC coil is built into the stock battery
so replacing ti almost always means you will love that functionality as far as I can see. I do not use this so it is okay but if you do it is worth keeping in mind.
I paid €200 for mine from CEX about 2 years ago now and that was worth it for me.
Batteries may only be shipped within the contiguous USA at this time
Otherwise that would be perfect as they probably would not use crappy suppliers.