Instruct: Classify a given review into positive or negative sentiment.
Query: Why are there others?

I bought my Whisperlite in 1996 and have yet to have a problem with it. (I think I may have cleaned it once) Simmering is a bit of a trick but if you use it several times before taking it into the woods you should be able to cook any food you can take in a back pack. There are stories about these stoves going into "meltdown" during light up on cold days but it is always because the user either over primed the stove or was using a damaged fuel line. If you accidentally over prime do not add more fuel. Just let what you have burn off.I have never had problems lighting the stove or keeping it going (although I did run out of fuel once). Light and VERY easy to use.Funny thing, it is a bit loud but you never notice until you turn it off.