Compact Body Compact body of Leica D-Lux Typ 109 makes it much easier to carry it with you all day.
Large Four Thirds (17.3 x 13 mm) sensor Large sensor in Leica D-Lux Typ 109 ensures a good low light image quality compared to smaller sensor, and it also provide shallow depth of field and a nice blurry background when needed.
RAW shooting capability RAW files contains much more color information compared to JPEGs, and gives you more room for post processing without significant quality loss. They provide wider dynamic range and option to recover shadow and highlight clipping to some degree.
405g Carrying this weight all day may not be very comfortable for you.
Body Thickness 55mm With a thickness of 55mm,Leica D-Lux Typ 109 is not a pocketable camera for sure.
3.1X Optical Zoom Having a camera with higher zoom ratio would be more practical.