It is often sketchy. The search function doesn’t work properly. Loading older messages often makes your client spaz out. There’s several glitchy commands. Spamming snowflakes can slow down your client to a crawl. A friend once crashed Element on my phone using a lot of nested quotes with muscle emojis. We had to spam other stuff so I could open Element again because the moment those messages started loading my client crashed again, preventing me from even changing the channel so I could open my app again.

I use Element and Matrix because it is the best privacy-respecting option, but it has a long way to go.