DNN [Platform] is great for organizations of any size who wish to have a robust CMS to manage their site. DNN is not ideal for a small site that is better suited to a super easy to user interface such as Wix. DNN [Platform] is plenty strong enough for enterprises and large entities.
Good for transferring over an existing site. Truth be told, I haven't used it for building a brand new site-- I know that this is a fairly common thing but I just never needed it. For what I've used it for, it has worked well. For a small business with anyone with a little bit of technical skill, it's surprisingly good.
Very easy to use CMS - Ease of use is paramount with CMS products to minimise on support calls. Also the template structure of pages ensures that content editors cannot inadvertently corrupt the layout of the page.
Powerful application framework - The existence of APIs for all functionality within the CMS provides limitless scope in terms of developing bespoke applications which sit within the CMS.
Commercially supported option available - For larger clients, the comfort factor of having a direct line to the developers of the application is a big selling point.
We can't really choose anyone else and the cost/effort of moving all of the hosted data would be extremely large, and we just have to stick to them, and hope they improve service
My experience with Joomla! was over six years ago so a lot could have changed. However, I prefer DNN over Joomla because DNN offers more modules and a better administration user interface.
We use Wix currently for our online store. It is nice and easy to use, but they don't offer the email domains as well (the last time we checked). They have pretty decent customization of the web page, but still limited. We're going to try it with GoDaddy, since we have other services from them already. It just doesn't make sense to pay two different companies for something we can do with one.
DNN helps us win bids on projects through the improvements the community has done over the past few years; we were ready to scrap it all together but it has made great strides
DNN's community has come back and is actively working to improve and expand the capabilities of the cms
on a negative note, the confusion between evoq and dnn has caused us headaches
GoDaddy reduces our ROI by costing me in non-billable hours. I don't charge clients for sitting on the phone with tech support to power cycle the server or fix the php.ini file, so my $/hr takes a hit.
Their nickel&dime strategy requires I have an additional conversation with clients about their max recurring fees. Small as they are, I need approval for upping their bill. GoDaddy is only the cheap option if you don't value security, stability, or performance.