Looks like a great product, and you nailed that landing page! I have a few criticisms, so forgive me if I sound overly pejorative.

1.How is this different than a chat window popup? I see these everywhere. What sets your product apart?

2.For me, popups like this are annoying if they are too intrusive, and they almost always are. How are you going to prevent this from turning away users like me from your clients software?

3.Are there going to be notifications sitting somewhere in the screen? This also is a turn off.

4.Most of the time as a user, I prefer email. Nobody is going to bug me, but support is there when I need them. Perhaps you could structure it more like that. Make it voluntary, rather than intrusive.