If you buy a DD-1 you're an idiot. I thought their products were nifty too, until i was told everything the DD1 and the CC1 does can be accomplished with an o-scope and DMM with twice as much flexibility and many, many more features. Not to mention you can actually see the numbers so you can put pen to paper and have numerical results instead of a "oh yeah, it's not distorted, i have no idea how much power my amp is putting out though."