Great! but with use restriction

Use as an illuminant in a spring-loaded lamp on my desk (early as architect lamp called) and in a white opal glass abedeckten "banker lamp"
(++) The light color is really white. Neither the butter-colored, yet the cool white tending. Thus optimal workspace lighting.
(+) Bulbs replaced at my 60-watt light bulb: The subjectively perceived light output is significantly higher than in the previous 60-watt light bulb. Is felt somewhere between a conventional 60- and 100-watt light bulb.
(+) No noticeable delay
(O) the biggest design flaw is the conditional unilateral angle: In the architect lamp does not bother (the metal funnel focuses the light downwards eh). But in the banker lamp I feel the one-sided light output as visually disturbing.
(O) Ample heating of the glass shelf in continuous operation - despite adequate ventilation slits in the sheet metal reflector lamp of architects. For less radiant heat through the glass body as an incandescent lamp. As a result, feels the reflector plate, the one occasionally touched the pan, less hot (up to lukewarm) as previously under incandescent operation.

Conclusion: For all lamps that are emitting light all around, less suitable. Wherever the lamp form specifies a luminous direction, excellent replacement for old bulbs.