The overall experience with UserTesting has been good. Most tests come with very clear instructions to elicit the tester's opinion and/or experience. The user interfaces we review are interesting and show multiple ways to present the information. In many cases the test is looking for the preferences of the tester. It's important to think through the process and provide honest input. I'd rate my experience with 5 stars but I have experienced some frustrating issues such as being asked to click a link which is not hyperlinked. Unfortunately copy and pasting the link in another window causes an issue with the test recorder.