I use it. I think it's good. It does speed up creating campaigns for Google, Yahoo and MSN plus it has some custom setup to other ppc engines. You set up your campaigns once and you get all your ppc engines output files to upload so you don't have to stuff around with excel files.
You also get some landing page templates and other stuff if you get the pro version. I looked at alternatives but from my research speedppc seemed to be the best option.
If you just learning, you might be better off saving your money on testing offers and get it once you start making a profit.