Avantages
Fun work environment for the most part. Dog friendly. The benefits were also pretty solid, too. When I was there they matched 401k up to 6%! Great work life balance.
Inconvénients
Very sexist upper management. I have seen first hand in meetings where ideas from women are completely ignored but the exact same idea from a man is hailed as genius. The pay. When I was there SparkFun Electronics chronically underpaid all of its positions. We called this the "Spark Fun Tax". SparkFun, at the time, was hoping they could leverage how "fun" or "cool" it was to work there in order to justify lower wages. That's fine if you are fresh out of college but for someone trying to do things like have a career and buy a house it's a problem.