Compact body of Canon ELPH 190 IS makes it much easier to carry it with you all day. 138g
This camera is so light that you can comfortably carry it around all day. 10.0X Optical Zoom
10.0X Optical Zoom of Canon ELPH 190 IS will give you a lot of flexibility considering this will be your only camera during the day.
Small 1/2.3" (6.17 x 4.55 mm) sensor
Canon ELPH 190 IS's small sensor struggles in low light situations compared to larger sensor. No 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.