I have a 525i sports trim for the last 4 years. First there is constant problem with the dashboard electronics. Some pixels keep missing. Also there are chronic issues with alternator and additional electronics in the car. It is like dying a death by 1000 cuts. This car stalled on me twice on the highway. Somehow I came out one piece. Each time a repair is conducted results in 500-1000USD tab and if you go to their dealer then God help you. BMW is a sleek and sporty car but sell it as soon as the manufacturer warranty is over.
Good speakers etc. Excellent acceleration.
Can't afford premium fuel. Lousy reliability of electronics. Most of the electronic sensors start dying after 5 years. Chronic problems with alternator etc. Very low clearance results in front hood damage at curbs due to very low clearance. Overall a lousy car and not worth it.