After switching on, do only once for about two seconds nothing, a small delay is probably of control due. Even when dimming this becomes noticeable as when pressing the dimmer until precisely that delay will change the brightness to. A small drawback, but that the more than reasonable price for a dimmable LED bulbs again more than offset is made and hardly noticeable in everyday life.
The brightness - the most important criterion - is excellent and even surpasses that of a 50 W lamp. Subjectively, anyway. The light color is warm, but in no yellowish. At first glance, one can conventionally hardly notice the change to LED in lighting.
Considering now the low price is that an absolute bargain and finally a real alternative to halogen bulbs with 50 watt. A strong buy recommendation.