Duda Mobile by itself is not bad of a plugin. What I had a MAJOR problem with is that they install their ad banner even on your regular site.
OK, so it make sense that if I am using the free version to test things out, their ad is in the mobile site (since this is what this plugin is doing for me). NOPE! They add it to your main homepage and it immediately makes your site looks cheap.
Soon as one of my worker told me about the ad, I had the plugin deactivated. The ad still stays on. I finally try to delete it. And the ad still stays on the homepage. I tried to look up their support for removing the ad, and they say it's only for people who upgrade (what about people who don't want to use the plugin anymore?!)
Horrible. It is because of the invasive nature of this plug-in that I have lost trust and confidence in this. I would STRONGLY discourage anyone installing this plug in. There are plenty of other mobile ones that do not do this kind of tricky ad tactic.