i have much more
they listen to feature requests....if enough people request something they will put it in (and of course if they think it is worth while)
they are nice and quick on bug fixes (and there arn't very many useually)
most peoples complaints were that it was ugly but they just released an awesome new skin to fix that problem.
it includes a ticketing system too, to give support to your clients via the panel.
it integrates with a great billing system (whois.cart, only $35 USD) and of course modernbill.
again my biggest selling point was stability and security, i didn't like how cpanel would just update something and then it would stop working, or have some major bugs.
accurate quotas too, (i remember cpanel's being broken)
plus it's quite a bit cheaper
i don't know what any one else can say
once you go DA you never go back (oh yeah i am no way affiliated with DA, just a happy user)
cheers