I will admit, when I saw the first screen shots for this I wasn't too impressed. And this is coming from someone who's played a LOT of RPGs too. However, I watched a few gameplay videos last week and just the few I saw changed my mind. I'm definitely gonna get this and give it a chance. It sure sounds like it's got an outstanding soundtrack. Cute kids-y games have never bothered me in the least. In fact I enjoy a lot of the more laid back, lighthearted RPGs and such.
Here's what I'd say..if you're interested, even mildly in checking it out at least rent it. You might change your mind and decide you at least like it and maybe buy it. But even if you don't buy it you might find you at least enjoyed it during the rental. I've found you can't truly judge a game until you've really sat down and spent time with it. Watching a few videos isn't a good judge of a game overall.
The thing that bothers me most about game reviewers is how much stock people take in them. I believe people should decide for themselves, based on what kinds of games they like and enjoy, what to buy. It's ok to base the decision somewhat on a review but the majority of it should be based on how you feel about the game. Read up on it, watch some videos and read some import impressions if it's already out in Japan so you have all the pieces necessary to make a decision. But don't base your gaming decisions solely on a review. I personally don't base most of my decisions on reviews.
Anyway, I look forward to playing this on Wednesday and am not bothered by the mediocre reception in the least. It looks like a decent game.