Are you running usability tests?

There are quite a few tools out there to for UX focused teams to run usability tests.

It seems like no matter the research methodology you prefer (moderated, unmoderated, 5 second test, quantitative, qualitative, etcetera), there is a platform or service for you. Pricing varies widely.

Have you used any of the tools in this space? What do you love? What do you hate? Do you have a favorite tool/platform/service?

Here are just a few I find most interesting;
https://www.usertesting.com/
https://usabilityhub.com/
https://userbrain.net/