The city is great fun.
Haulin at the top of 6th gear through the city in a panzer and stompin on the brakes to get a shot... I love it.
But I have to admit, when framerates are good, and numbers are low, the sneakin around part is more challenging.
Camping, damage lag, unhittable targets, and invisible barriers all just come with the territory. When it's good, it's good. When it's bad, hit an airfield.