I have only used the tool a few times but it worked as advertised and saved a nice chunk of my time doing it. I was searching for interesting placements for a pretty specific niche and Tubetarget found a number of quality channels/videos that I was unaware of. If you do anything with YouTube ads, this should pay for itself in a couple of uses. The interface takes a second to get into but there are tutorials front and center and I never had any trouble.