Use Cases and Deployment Scope:

As a UX Researcher, I employ UserTesting in my daily flow. I launch a number of qualitative studies, and UserTesting has not failed me ONCE in recruiting participants who meet my stringent criteria within tight deadlines. The transcription tool that writes out participants' feedback is also incredibly helpful in my analysis and synthesis process.

Likelihood to Recommend:

Use UserTesting if you need to recruit participants QUICKLY to get fast results. If you're running a particularly stringent project, UserTesting's screener tool isn't the most rigorous as I've had several participants who shouldn't have qualified based on the screener questions pass through and end up as participants in my studies. If strict adherence to participant recruitment guidelines is of top priority, you might want to use a more traditional approach to recruitment.