As a beginner affiliate, I've been looking at different spytools but ultimately decided to go with this one. Mainly because of the competitive price. Compared to other more expensive spytools, it might not have as much ads or networks, but it's definately worth investing into especially if your a beginner to get an idea of what others are doing. Plus, although they don't have as much networks, it still has some big networks such as PropellarAds which was the main source I was trying to spy on ;)