I'm in a position where I know enough about riichi mahjong that I can follow along the manga no problem, but after 295 chapters the only new thing I learnt is that I should play mahjong with no underwear if I want to play better. What bugs me is how the manga devolves into fanservice, I don't understand why the author feels the need to draw so many characters with huge honkers, it has nothing to do with mahjong and doesn't value add to the story. (I swear Nodoka's chest wasn't as big in the earlier chapters??) The last few chapters also have some scenesand drawings that look really rushed and unfinished and it gives me the feeling that the author is just trying to end the manga asap after it's gone on for so long. Personally, story wise I think its fine, but the other factors kinda have me going with mixed feelings on this one.