I know this thread is fairly old, but I just joined the forum and thought I'd offer my two sense.
I'm also new to 3D printers, although I've had a QUBD Two Up (the orginal version), for just over a year. I don't personally recommend it, unless you really want to tinker. The newer versions might be better though. I wanted to design a few parts for it, as opposed to just searching through Thinigverse and grabbing parts here and there. I wanted to make this printer my own. I stumbled across DesignSpark Mechanical, and I've mainly used that. I haven't done too much with it, but I have designed functional upgrades with it, such as a pulley system that gets rid of the X-gantry sag. I don't come from an engineering/designer background, I'm studying computer programming, so it was a new experience. I recommend it for learning purposes, and small things. If you want to design things that have more curves, and are more organic, rather then machanical in nature, find a different software, otherwise, try this one out. It's free, so only your time will be used up if you don't like it.