Simple and "easy" to use.
The 3rd party website containing the userstyles is awfully slow. (This didn't influence my rating)

Slowpoke... Takes about 5 minutes for it to understand that the ONLY style actually DOES exist. Until that it strongly believes that there is absolutely NO styles.

been using this a long time and it is such an excellent extension that, given its syntax highlighting, checking and auto-complete, can help one learn css in addition to applying it

and here i'm adding a 6th star just because of it perfect privacy policy...

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Great addon, but has it's limits. Also userstyles.org page works very poor, so getting styles is very hard.

It does the job.

I appreciate this addon however, where and how do people get styles now? The userstyles.org page has been completely effed up for a long time now, it's unbelieveably slow or it just doesn't load. I didn't know it was possible for a website to run that badly in 2020.
If anyone could reply, it would be greatly appreciated. I am not the best with computers but I at least figured out this addon.