The product is flexible and integrates with Intercom, meaning it could make a decent component in your customer service stack. There is quite a lot of flexibility in how to setup and conduct surveys compared to something like MailChimp.
Despite a good product, the issues with Survicate lay with their people, their T&Cs and their customer service. They are one of the few companies to take credit card details for free trials, and they offer no system for notifying you when they are about to take money from your account. We thought we had successfully cancelled only to discover that they had taken money for 3 months from our account unbeknownst to us until we received our credit card statements. On contacting them, they advised that they wouldn't consider a refund in any circumstance whatsoever. Their responses between emails was often over a week, so making any headway was almost impossible.
Avoid this organization. Whilst the product is solid, their business ethics and the quality of support is woeful. This means that when things go wrong, you will likely be stuck without any recourse.
A more flexible solution for customer surveys than MailChimp.