I really dislike the fact that deconetwork uses a demo site that is relatively responsive on mobile, but all of their templates require massive overhauls to bring into this decade. Oh, and guess what, once you edit the html or css, they no longer support their templates.
They clearly don't offer a free trial because they know they will get lots of you to sign up for one month thinking you can get up and running quickly with a professional presence for your company. They know that isn't possible, so they get what they can while they can.
If you can handle massive coding or think your customers don't mind zooming and moving all over your site to read it on their mobile devices give them your money. But be warned, they won't give it back when they don't deliver what they promise in their advertising.