Zonka feedback is an amazing software, I love it. So far my experience with it has been nothing short of great.
The customer support team is super quick to respond to any questions I had so far and they were able to help me solve any question or problem I had almost immediately.
I scheduled a demo with one of the employees and he showed me how to set up customized surveys.
The platform is super intuitive and user friendly, but there is also a lot of options that I haven't explored yet.

So far I just use it to create surveys for my website. Haven't used it for email or sms surveys yet. Will make an update on the software later on.