It is worth it. I havent got one but my PA, has the mini kit so she can go away anytime and still do some work for me. I know of a guy whom has the larger one on a stand on his motorhome, permanently, as it auto adjusts that works well, the mini kit I believe you can't fit it to a roof as it doesn't auto adjust, has to be manually adjusted. That is a great price for the mini kit though.