Just finished it and surprisingly, it wasn't nearly as good as the first game, Oyama and the vagrant got the most entertaining routes, Yasui too but the ending was grim (even though brunette Ryouka is sex), Nobuo, Daisuke and Masaru got easily the worst routes, they were so thin in content and the scenes were pretty tame compared to the original game's (Daisuke's route shower CG is probably one of the best in this game though), the "kurosaki" route felt like a slap in the face and hated every single second of it.
You can call me crazy but in my opinion Saki carried the sequel, her casual outfit is deadly and most of her scenes are amazing, Shinachiku Castella really shines when it comes to pushover/weak-willed female characters, wouldn't mind buying a Saki only spin-off!
tl;dr: It wasn't as good as the first one, but we got to witness Ryouka's radiant smile so worth.