Say I Love You is not the masterpiece I expected, but it's still a show worth watching. The characters and story were alright but in my opinion, the plot ran a bit too slowly.
I've never completed this anime because the pacing doesn't fufill my interests enough. Still, there are sweet moments here and there that make me smile and there's nothing off about the show. In fact, the show is pretty well done. It just didn't quite meet my standards in terms of drama.
I prefer shows with comedy and drama or action and fantasy to spice up the non-romance portion, if there is implied romance. That being said, this show was sweet all the way. Despite implied sex, there isn't any harem or explicit fan service; not that you'd expect any in a shoujo.