I have a "no frills" hairstyle (long, naturally straight and fine) that can air-dry and still look okay.  Therefore, I have never been one to spend a lot of money on styling tools.  I bought this very basic, inexpensive hair dryer since I normally don't have time for air-drying.  It worked "okay" for the past 2 years--it dried my hair in about 10 minutes but left lots of little frizzes on top that I would then have to smooth out with an iron.  It just met the bare minimum requirements for a hair dryer, nothing more.  I cleaned the lint filter regularly and only used it a few times a week.  I was therefore surprised when it shot out sparks and smoke while using it yesterday morning.  I carefully unplugged it and disposed of it.