HM fan for 7 years and I think some people are a bit too harsh on this game...
The good- Old school HM fun(not at all like innocent life): You get married, take care of animals and crops, go fishing enjoy festivals, ect. You get to be a girl without waiting for a year for the female version(YAY!)
The bad- A BIT slow.
I'd advise you to rent it first though and give it some time. The game really grows on you like every other HM.
Note:From what I've seen HM and the PSP don't mix as well as Nintendo systems and I'm hoping Natsume will be able to work out the kinks.