The bulbs I got differ slightly from that shown on the picture (definitely it is not "latest and improved design"), but they work ok, the light is evenly distributed, quite bright. Actual input power at 12 V is 0.6 W, so promised 150 lm is rather far from reality. There seems to have an embedded current source, which keeps the input current (and the light intensity) constant - ca. 58 mA, but not the consumed power, which depends on the input voltage.
Excellent product! Very good and fast shipping.