have mine a while now and its runnin sweet, make sure you warm the car you test first, there quite sluggish untill there warm. the car should idle between 500 and 1000 rpm when warm and the temp needle should sit half way. i use mine as my daily driver and driving from home to work i rarely use the second turbo, the first turbo gives ample power for that type of driving. ive never had anyone drive or get out of my car and say its underpowered but you will always encounter somebody who has a negative opinion about one thing or another. they take a while to get used to cause of the twin turbo cause if you change into a higher gear as the second turbo is about to spool you will land yourself into some serious turbo lag called the vod, if you buy a 04 onwards this does not apply cause they have a differant turbo set up....twin scroll instead of two turbos.
ive had mixed reports on there handling, some say there tail happy and kick out the rear easilly and others say they understeer a lot.......my experience with my own is its never really understeered and its quite difficult to kick out the back, unless on a slippy roundabout....but i would imagine its down to the car, tyres and what suspension it has.
if ye have any specific questions ask away and we'll do our best
And much cheaper tom insure than Imprezas 
