Looks good, although the previous mentioned point of your revenuestream is a big questionmark, I'd rather pay 1USD/domain or whatever to know it will stick around.

I tried looking at your ns-servers for the screenshot-example(100armstrong.biz) but that seemed fake. Your own domain are using:

answer: entrydns.net 3600 NS ns3.serveriai.lt answer: entrydns.net 3600 NS ns4.serveriai.lt answer: entrydns.net 3600 NS ns1.serveriai.lt answer: entrydns.net 3600 NS ns2.serveriai.lt

Checking what serveriai.lt is makes me wonder how stable that can be. Not beeing from .lt its hard to know if thats a thrustworthy provider. I would suggest you put a few examples ns-records for the domains that will be hosted by you, and perhaps an action plan for failures at any of those, or a nameserver upstream. A good addition might also be to show how geographically distributed your ns-servers are, and perhaps give users a few options so they can make sure theres always a nsserver within the same country or continent as most of the users.

Your upcoming feature-list looks really interesting and something that could be well suited as a paid-for-option.

Good luck!

Edit: got some more ideas after posting