After my MW has 600 SE blessed by the temporal, had to be something new. At best, the SBH 52 Sony met my expectation. The unit is designed mainly for Android devices, I myself use a Windows Phone (Lumia 920), so I can not draw on the full range of functions. From the sound of her, it corresponds to the old device, it is neither better nor worse. The transmission is stable, with the old 600 MW had a little more coverage. The coupling via NFC works fast. Very helpful. Hold short against the mobile, ready. Works every time very reliable. I like the many individual keys, especially for the volume. The MW600 had a touch-sensitive bar that almost no longer worked very imprecise and at the end. The SBH52 is also a bit louder than the old unit. The radio works very well and shines with proper reception and is a little louder than the old unit. Just the sound of the radio is a bit flat. Clean but quite bassarm. Making calls of course, both parties get along well. Contrary to the manual not only the caller's number but the name will be displayed during a call, this is actually only work with Android devices. In addition, the headset will ring with its own sound. Is funny the additional built-in speakers. This does not sound much worse than most speakers of mobile phones and is surprisingly loud. So one has simultaneously a full speakerphone for the car. So there are three ways to make calls. A connected headset over the small speaker (device like a cell phone is held to the ear), or just on the big speakers. Really great. The supplied headphones I have not been tested. The headset can be used in full during charging. Due to the many functions I find the price quite reasonable. Should I nevertheless times want to have an Android device, I have even more beautiful update options. One point deduction for the moderate range and tonally flat Radio.