there good.
ausie ones are the goods. they are quite tall geared.
they have a closed deck block with oil squirters. (wrx doesnt)
turbo of a 97 wrx (tdo5) is a good upgrade
brakes are abit average so is the rear lsd.
they are renound to have dodgy lifters. BUT THOSE HEADS FLOW THE BEST OUT OF THEM ALL,a warenty fix was to fit wrx heads. but they arnt as good. converting them to solid lifters is a good idea.no more tapping.
gearboxes are ok but will be abit crunchy.
on the whole its like buying a 32gtr. if its good its great if its not its a nightmare.