What I like best about UserIQ is the amount of raw data the site provides on our products. I can than move that data in the ways that best suit my own research and analytics.

UserIQ is easy to setup into your software, if you have a multi-page application. It is also fairly straightforward to create a campaign. They are able to create and use custom variables specifically for your product/application to really provide custom data. There is soo much that you can do give the amount of data that is being collected.

eMail support is always available. Usually less than 1 hour response time.