This is a great little track car, powerful straight 6 with excellent power to weight, and tremendous handling performance. Its low to the ground, with low profile tires and a very stiff suspension, so you feel every bump, but presumably you're looking for performance in a car like this, so don't complain! She behaves like an overpowered go-kart that's glued to the road. I had been considering several V8 sports cars when I bought this, but was sensitive to fuels economy at the time as this was my daily driver, and also wanted a convertible. I've never regretted it, I average 25MPG, and I do NOT drive it in an economical fashion! Even after many years, this car's looks are timeless. I sometimes think about what to do when it comes time to replace her, and over the years I've done some investigating, the Z4 (now Z4M) still is top of the charts for my needs. I wouldn't recommend wasting time with the 2.5 litre motor though, unless you just want it for looks, the 3.0 with sport pack was a must for me, and makes a lot of difference.

Pluses:
Mileage
Perfomance
Looks
Reliability
Value

Cons:
Run-Flat Tires (ride, cost)
Ride Comfort (I'm ok with it, the wife, not so much)
Repair cost (BMW is expensive when time to repair, but happens infrequently)
Tiny trunk/storage (you'll adapt!)