At work (a well-known multinational) they paid for Copilot subscriptions for the plugin for a (non-MS) IDE. Sometimes it was just brilliant, especially on the code completion front. Other times it was utterly moronic (as one example, it struggles with different versions of 3rd party libraries we use - no comprehension of what version even means). The plugin sometimes stopped logging in after an update to the IDE, and the only way we could get it to work was to uninstall, wipe any remaining directories (with settings), reinstall the newest version, install the plugin, apply settings by hand. Not nice.
We now have an in-house plugin (IE, browser, Jira, Confluence, etc.) that is based on who knows what LLM. Not worse than the previous, although it does have usability warts. But it's more accessible. Does code and general stuff (I used it quite often for multi-language translations, even works well with a certain non-standardized dialect we decided to support. Quite a time saver.)
For private general use, let's just say I detest installing apps and logging in to YET ANOTHER account (any, for that matter). I used ChatGPT for a while on the web, but the then open, then login needed offering, together with the prompt limit, made me look at alternatives. I used copilot.microsoft.com for a while, and even though they would sometimes show the login screen, just going back to the above URL got me chatting. I did like it that it also gave references to websites that it used. Also tried those from X and Meta... couldn't see much of a benefit of any one over the others. However, I've recently started using the chat option at duckduckgo.com. Although it is cumbersome to have to click through a couple of screens before getting to chat, the results are quite OK for my needs.
YMMV. So far, I'm fairly promiscuous regarding LLMs and think loyalty to one company is outdated.