Ive been using Feedback whiz for just about a year now and is very impressed by its functions. The best thing about Feedback Whiz is that they do not charge you for the amount of emails.
The templates and email sequences are easy to setup and it gives you daily email reports of returns and feedback/product reviews received.
The best part that I love about this software is that we're able to insert gifs and emojis in the email subject line to grab the attention of the customer. This is one of the best investments that I've made in my Amazon business!!