Compared to the brand manufacturers Philips and Osram bulbs this is to get adäuaten price. Very positive I feel the light output, the brightness is comparable to a conventional 100 Watt Light bulb with a pleasant warm and cozy light color. From the design / shape it hardly differs from a conventional bulb Globe. Only the life, I no vote because it is so far just 7 months (problems) in use. (Even successor 4254 - dimmable !! from other Amazon offer now for 4 months without any problems in the application)
Conclusion: so far a strong buy recommendation, low consumption in bright and homely light output.