How do i know if this will work, without purchasing it and wasting money if it doesnt?

So, without spending $70 ... and not knowing anything about animation or modeling, how do i know if this would even work? I dont know what or even how to know if a model can be converted to a humanoid from generic or not? And since apparently theres no way to test without purchasing.. im stuck.. Where can i go from here? I dont do enough 3d to even begin to justify saying ill buy it and i'll use it later down the road.. chances are I wont. 99% of everything i do is 2d.. this just happens to be that 1%, and i only want this for maybe, 3-4 animations total.. any thoughts here? i can happily supply the animation and/or the model via email ?