in some ways it might be awesome (combat) 
but i thought they had learnt something from the demon baby fight in the first one.......

but the soundtrack is kick ass

I enjoy it. The game is a lot better than Parasite Eve 2. I may be a little biased though, I hated the second because they removed pretty much any sort of RPG mechanics, and they seem to be back in the 3rd Birthday. I am only about an hour in, but I enjoy it.
 
My only real concerns at the moment is the story isn't as interesting as the 1st Parasite Eve and the controls are alright for a PSP shooter, but not compared to a console game.

It's not Nomura's best work, but he is 100% focused on Versus XIII at the moment I wasn't surprised.  PE died after the first game.

Thinking about getting it but been put off by the mixed reviews. Should I get it ?

" @RampageAssassin: I say no.  It has no connection to either the book or the two games.  Nomura wasn't in control of it, so it turned out shitty.  It's just a subpar action game with clothes breaking off. "

This game is okay. It's not as "scary" as previous PE games was; it's a bit more like a portable TPS done right.
 
It's one of the few games that I've enjoyed on my PSP.

Mixed bags can be fine, as long as the pieces are greater than the sum of their parts... 
>_> 
<_<

It's alright so far.  I'm only a few missions in though.  Somebody please tell me the enemies become more varied as you get further in the game.

" @SlashseveN303 In this game's case, some of the sum of the parts contain some greatness, some other parts of the sum do not. It just doesn't feel like PE. "

my problem with it so far is that there are some annoying spikes in difficulty 
plus you some time run around confused as FFFFF SHOT WHAT FACEDESK 
also camera... kinda

" It's alright so far.  I'm only a few missions in though.  Somebody please tell me the enemies become more varied as you get further in the game. "