The tool is generally competent in sending surveys. We have integrated it with some custom Salesforce objects so that responses are automatically pushed into Salesforce, enabling reporting. Our surveys are multilingual. We like the scheduling feature and the ability to send reminders to recipients who have not responded yet. Very good support from Customer Success team.
The learning curve for the tool is surprisingly high. The user interface needs a lot of work. For example, it is not at all obvious how to create internationalized subject lines in outbound email; and to re-run a report, you have to run through the report designer wizard and not change any settings, and the report re-runs when you reach the end. Due to these issues this is one of the only tools that IT holds close to the vest - we discourage business users from using the tool directly, preferring that IT implement their survey.
Designing surveys can be difficult to meet what may seem like basic business requirements. List management features are difficult to use, making it hard for us to manage unsubscribes from survey to survey. We lean on our Customer Success rep a lot for guidance on how to achieve what we need to achieve.