Don't let the negative comments put you down. Read it for yourself. I actually ended up fairly liking this manga.
As many others have mentioned, yes, it's filled with shoujo clichés, and the story is pretty much predictable. Sô can be a jerk (but his jerkiness can often be justified because of various reasons, including being rich ( = missing realistic view of the world) and a troubled childhood which can pretty much f*ck up every child), but I've encountered much worse male characters in other shoujo mangas.
What really kept me going through all the volumes was Ai. Ai is pretty much amazing, strong and admirable. She's headstrong, and pursues her goals like a mad man. But what was really interesting was the view upon beauty, and how beauty is actually just as much about tidiness and sense of style as actually being naturally beautiful. That is actually very true, and it makes a pretty realistic picture about beauty in nowadays society. The manga is also very harsh towards people who blame their misfortune upon them being fat, out of shape or ugly. Actually quite a life lesson and eye-opener, even though some aspects of the manga can be a bit morally twisted.
One of these morally twisted aspects is about virginity. Ai doesn't want to be a virgin until the age of 30. Pretty much everyone in the manga looks down upon virginity among people their age (and older). But actually this aspect is realistic too. I can't know if this occurs all over the world, but in my society virginity past the twenties is often seen as uncommon and therefore a bit embarrassing. So even though it is morally wrong of these young people in the manga to be talking about virginity like that, it's pretty much the truth anyway.
The serious topics put aside, I actually like this shoujo manga. Of course it is targeted toward younger females, and therefore it is best suited for females (as others have mentioned), but it wasn't bad. The art was good, the plot was (though cliché) cute enough and the manga itself held some truth about real life. There was some humour, and Ai definitely lifted up the worth of the story, since she isn't completely your typical shoujo heroine. She is not stupid (though a bit naive at times, since this is her first romance), and she deals with the problems well.
On a side note, I have read a lot of shoujo, and I've often been forced to take breaks from mangas since the characters irritated me so much, but I had no need for breaks while reading this one. That must count for something.
At least worth a read for shoujo fans.