I have been using this for a couple of days now
It is solid, I like the fact that it is a private thing.. you are in control
And with the appsumo deal you are whitelabled which makes it even better.
The first thing you need to think about is what can you use this for.
Then knowing this can be a huge differenciator between you and your competition, there is simply no better way to be in touch with your users/customers.
I really love it!