Light color is brighter than halogen, but fully in order.
In direct comparison (see photos), the difference is visible,
but the LED the colors are also very beautiful.
Looking at the energy efficiency speaks everything for the LED.
Currently I have 9 GU9 lamps in the dining room built (6 Dining Table, 3 sconces).
= 9 * 40 Watt = 360 Watt
9 LED = 9 * 2.8 = 25.2 watts.
Summary:
+ Light color: pleasant, absolutely useful
+ Power consumption: just awesome
+ 100% 1: 1 replacement in my case
- Biggest drawback: Currently not available ;-)