BWM leases are very favorable for some models. The equivalent APR for example on my wife's car was 4.6%.
Don't lease until you fully understand the process and calculation. Don't shop by the payment. Rather, nail down the price of the car first and go from there.
2006 E90 330i (retired)
2009 E90 335i (retired)
2012 E70 X5 50i M Sport, JB Stage 1, 4.6 secs 0-60.
2011 VW GTI/DSG