Well I forgot to mention, if you use a guide don't scroll down to the end, just do it little by little as you play the novel that way you wont get the plot spoiled.
In rewrite the whole friend list, quest missions and gps thing is kinda bs.
In fsn I got all the bad endings just to see taiga getting mad but still doing that can pull you off from the novel so there are some people that don't like it, there are novels that without a guide are pretty much impossible like cross channel where you get stuck in a loop if you pick something wrong in the first week and you don't even know why.