The first 3 CFLs we used (11w in 2 bedroom table lamps and a 13w in living room light) were purchased at Ikea some 7 years ago. (They were not the modern horizontal spiral design but rather the older verticial tube "folded" design.)
When the living room bulb "died" late one night 2 years later with a "pop" while lit, an acrid black plume spiraled to the ceiling. (This lamp was on 12 hours per day on average.)
We replaced this bulb in the living room with a brighter wattage GE one, and because the original Ikea ones were too dim for the bedroom, upgraded those too to larger GE spiral ones. (We have avoided Ikea bulbs ever since, and now use "name brand" GE or Sylvania ones only.) So far none of the GE or Sylvania bulbs have "burned out".