Again, Down said it well. In one of the guys that would tell you to do whichever Heroine's route you like best, first. I really liked Haru, and I'm VERY glad that I did her route first. For me, it would have taken away from her amazing story, and the whole game, to do get last.
When it comes to visual novels, I suggest listening to suggestions, but ultimately following your heart : ).
Also, an important note: a lot of guides on internet are written to get you to 100 percent completion of a game. if you don't care about that, you don't necessarily need to follow them in an exact way. That's why on the Fuwanovel walkthroughs, we do it by route. Again, my suggestion is to follow your heart and just enjoy the experience.