I actually jumped into this game two years ago, deciding I needed to see just how bad it is. I don't know how many others around here have played it. I know that, as far as people here only are concern, Magicpaint, Cyllya, and I are the only ones that have played through it. The three of us have said that it's not as bad as people make it out to be, but acknowledge that there are major problems with the game (they also told me that they find my verdict on Tales of the Tempest, "fair enough").
As for me, I'll tell you what problems I found.
I do have my longer version here.
Since you're wondering about problems with the game. These are ones I have to point out.
*Too short, even for a handheld RPG.
*Too easy. Bosses were particularly pathetic.
*Disorganized menus. Start digging around and it's not going to be smooth.
*Broken mechanics. You get the Nurse spell as well as Lemon Gel and Elixir within the first hour or two. Oh, the transformation is easily abused. You activate it when in critical condition and you stay a wereman until you're drained of TP, which you can use a Pine Gel to keep it going longer. The Wereman is very powerful too and, once again, easily abused.
Yes, there's some good aspects (Touch screen not being intrusive, the music is good, and battle system looked like it could have worked), but they're overshadowed by its flaw. In all honestly, it's a highly mediocre game that I can't recommend. I certainly don't hate it like I do Too Human and Eternal Sonata, but it's still pretty lacking. As for getting it for your Tales collection, don't pay anything higher than $20, otherwise, just pass.