How does this compare to SENuke X?
At the moment Nuke has the edge. It posts to a few more sites out of the box and let's you diagram out your own linking structure before you start.
However, value wise I think UD is a little better. It costs $347 (through my link - and with that you get thousands of extra sites to link to, tutorials and free membership meaning the sites and other stuff just keep coming twice a month for the lifetime of Ultimate Demon) against $147 per month SENUkeX.
Added to that the structure feature is being added to Demon as we speak and has an ETA of late May (6 weeks).
UD is also "neat" it runs fast, has only ever fallen over on me once (and I hammer it night and day) looks professional (it looks like a professional office style application) and has the best support I've come across in IM .
For example Edwinsofts flagship product BMD is a six year old one off fee item that still rocks and was last updated 3 days ago. Not just updated, they keep adding features and improvements every time - If you can name anything in IM that can match that I'd be surprised.
Also Nuke has keyword research (not brilliant - but it has it) and creates the disposable emails (again - not flawlessly - but it does it). Past that there not a lot of difference between them. If you have a keyword tool and can create your own emails (which you should do anyway using Cpanel emails gives far greater success than using free services which are auto-blocked by many article and WEB2 sites) then the differences are small, and getting smaller by the update. I never use the Nuke keyword tool anyway, I have samurai and TT for that, and they are a fair bit better and faster. I also never use free emails unless I'm just "chucking out junk" as quick as I can and am prepared to accept a lot of sign up failures.
But fairs fair, at the moment Nuke has the edge. Nuke is a great tool, but in a couple of months time it's going to have to explain why for the next 24 months it will set you back over $3500 and Ultimate Demon will set you back under $350,(if you buy with a $50 discount) for tools that do more or less the exact same thing. (emails and keyword aside).
Full disclosure, I am an affiliate of UD - so don't take my word for it do your own research. I use Nuke as well (and like it) I hot seat with "Vixen169" now and again to get stuff done.
Scritty