I used it for a few years on Oneplus Nord, and a few days ago switched to pixel7 with LineageOS. First impressions are that e/os was much more usable out of the box.

I surely have worse experience with banking: Revolut and SmartID app just refuse to work due to rooted phone (worked well on e/os). Other bank app is somewhat more broken - on e/os it didnt fully load but at least showed notificatioms on each transaction, now doesnt and is useless.
Could be due to newer android version on LineageOS though, I didnt investigate that.

/e/os is often behind on Android monthly security patches (sometimes up to a month or more!) and the apps they fork I have heard also often lag behind upstream. It also doesnt do much to deblob the ROM if proprietary binary blobs.

Comparison table of Android ROMs: https://eylenburg.github.io/android_comparison.htm

It’s pretty solid. I use it daily and don’t have any big problems. Install is simple. Just install adb and fastboot from your linux repository. This should cover the most of the installation requirements.

Their easy installer is why many people I know installed it, but it only supports 21 devices and mine wasn't one of them, so I can't say much about usability or security. If yours is one of them, there's also a Linux guide on their website: https://doc.e.foundation/easy-installer

I've used it for almost five years, flashed it myself on my FP3. I disabled microG and I'm very careful & strict about what I install on my phone, also their Advanced Privacy set of tools is pretty good. For my threat model is more than enough and I am very happy overall. Never had any serious issues, or even mildly serious ones tbh, despite people yelling about Android security updates arriving late. There was an outage in their cloud services in October that required a complete revamping of their server infrastructure and that took months but I don't use their cloud so I wasn't affected at all.

Here is a good comparison. As a reminder, there is no privacy without security, so if you live in the US (or anywhere that illegal searches happen regularly), I'd argue a less secure solution is by definition a less private solution.

https://eylenburg.github.io/android_comparison.htm

/e/ has good but not perfect privacy. It still contains connections to Google and they added a tracking parameter to their update calls.

Their update cycles are very slow. You are usually one to two months behind monthly security updates. Full bulletins are a year behind and Webview is a problem as well. They ignore this point and do not realize, that Insuffizienz security is a privacy risk AS well.

So if you want good privacy with a convenient user experience and without thoughts about security, here you go.

Depends on how far you want to go. From what I've been able to tell, they pedel a lot of flashy metrics and still had a bunch of google calls. Some of which you can manually remove, same as LOS. I would avoid buying into their cloud and keeping an eye on things yourself, if you want to install it. I saw them rebrand a bunch of OSS tooling as their own products back then. Don't know if things changed since then, but I don't trust the marketing.

A couple of my coworkers use it they are pretty happy with it and it works good from what I’ve heard :)

What phone do you want to flash on? Is it in this list? https://doc.e.foundation/devices

Im using it for a couple of years. I flashed my fairphone 3 by my self back then, before the easy installer. It was the first time i did something "advanced" with a phone, but it worked quite well. After my fairphone 3 died, I bought a Fairphone 4 via murena. So everything was already installed etc In total I am happy with the Os. Their goal, the release of privacy oriented OS for everyone (so f.e. even my parents could use them) is quite of a utopia I suppose. But still, the team and community are doing a good job.

Yeah I already heard about grapheneOS, but its not working well with fairphone right? So murena it is for me :) And I would recommend to people, who are aware of the downsides and are little enthusiastic :)

Personally I hear it had been a mixed bag. Hopefully time has refined this... Old stories about digging up old LOS images, bare minimal patches, and release under e branding with no consideration for security/hardening. Buuut that was info from a grapheneos vs eos forum, or something. Do your research, you know what sub you're in.