They are a suspension upgrade away from being a decent car to drive, setup is far too soft, think comfy Gt cruiser in stock trim, I test drove the Prodrive S 2.2 and V6 when they came out and they were tidy handling cars, the 2.2 didn’t feel fast but it could cover ground well.
I had a 2.4 diesel Brera for 3 months when my Alfa GT was in for a repair, it was a bit laggier than the 1.9 I owned but once you learned to drive around it as you do with most turbos I quite enjoyed it, had a reasonable engine note and really good torque. I didn't pay attention to fuel economy by that point I had realized whether a car does 60 mpg or 35mpg it makes very little difference to my life in reality even at 25k a year.