I hear this a lot, but my fairly inexpensive IKEA sofa is about eight years old with no problems at all so far.
EDIT: Actually, in general I've found that my IKEA furniture has done pretty well (basically everything in the house is IKEA) with the sole exception of a "Lack" coffee table, whose surface is kinda disintegrating after 8 years (I think it's basically made of cardboard with a veneer...). The name should perhaps have been a warning.
EDIT: Actually, in general I've found that my IKEA furniture has done pretty well (basically everything in the house is IKEA) with the sole exception of a "Lack" coffee table, whose surface is kinda disintegrating after 8 years (I think it's basically made of cardboard with a veneer...). The name should perhaps have been a warning.