The H-K upgrade in my '11 Sedan is very similar to the Logic-7 in my '06 Sedan. The speakers are a different color and the amp is a different model, but the sound is very comparable.
Quite good IMHO but not like the competition systems my brother puts into his cars. Last car he had the stereo was worth more than the car.
Hers: 2011 VW Golf TDI DSG Loaded
Mine: 2011 335d 6/28/10 ED Tasman Green/Saddle, ZPP, ZSP, ZCW, Nav, H-K audio, paddles, CA
Mine #2: 2012 Ford F-150 XLT 4x4 V6 'Ecoboost' twin turbo boat puller dump runner
Sold: 2006 330i Silver/Black MT, ZPP, ZSP, ZCW