These bulbs seem to be quite popular on the supermarket shelves (and cheaper too!). In terms of quality, you have to be careful not to touch any of the glass element of the bulb, as the glass itself is quite thin and does react with the skin oil, therefore considerably shortening the lifespan of the bulb. Hold the bulb by the provided carton enclosure around the spirals when screwing the bulb in.
On the other note, the bulb is OK, does produce warm type light, although a bit dull for my liking. OK for "atmospheric", background lighting. Would not recommend it in the reading lamps.
Also, 3 years on, do notice some degradation in the amount of light it produces (dust is blown off regularly).
8 Years warranty? Heh, try to find the reciept after a year!!