No problem at all. It really comes in handy. Last year between my fiance's and my bikes, we change 15 sets of tires, plus a handful for others. In 2008 and 2009 I was probably changing around 100-150 tires a year, around 30-50 for myself doing track days and street miles, and then tons for friends. The changer paid for itself the first year, and probably has made me enough to buy a few sets of tires.
Good luck, watch the videos on youtube for changing them, and take your time.