Can't tell you about a manual 228i - I attended a BMW event in July and was given an opportunity to drive an auto 228i on a small auto-X circuit. The car is a pretty fun to drive, however.... There is however ( I drive a six-speed M235i), M235i chassis feels a tad more solid - I didn't take it on a dry auto-x yet, I did some winter auto-x - maybe I am biased
I would love to get my hands on a track package 228i with a six-speed to compare the fun factor!