My personal judgment:
(0) Design and size. Of course, the LED lamps are found comparatively large, still have fitted easily into the 45mm-cylinder umbrellas with me. And, by the way, is precisely these lamps are with their 65mm length still relatively compact, compared with those of competitors.
(-) Assembly. As mentioned here several times, the two contact eyes should be slightly bent so that the bulb adheres securely in the socket, here I would like to thank for the tip in one of the reviews. Why this is so, I have not researched in detail, as long as here is a quick fix.
(0) light effect. Yes, the light is already noticeably different, but I feel it is not disturbing. The colors are a bit colder, there is in our perception the glowing reference much too hard;) It's just like one of the product images is trying to convey here. But you get used to it quickly. Of course, the use of these bulbs in lighting-critical environments where the correct color reproduction is important (photo lab, clothes shops, ...) must be very carefully considered.
(+) Energy efficiency. Proper performance measurement has not yet been carried out, although the workplace I have the opportunity, but do not have time; (Only the comparative measurement de rotational speed of the electricity meter in direct comparison bulb LED was already very impressive, the speed increase when you turn the populated with 3 LED bulb lamp was barely perceptible.
The brightness and the illumination of the room is in my estimation at about 92% -95% of the original light bulbs solution, and I think about my earlier 3x40W there had to have. So it is minimally darker, maybe it's even genuso light our eyes take the colder light differently. But also depends heavily on lampshade and interior design.
(+) Life. Furthermore, I must of course write only in 5-10 years. But since I'm from the specialist and our company produces even uA LED lighting, I can remember in the last 9 years of no complaints or repair that has due to a disused LED submitted to us. Here alone has the fundamentally different technology already significantly higher life expectancy.
How high the manufacturer has designed the drive and the cooling at sebson bulbs, of course I can not judge, because for this I would have to take a bit apart a pear)
Conclusion: From today's perspective - strong buy recommendation.
