Pretty clean burn.  Follow the direction as in instructed and shake each can very well.  I have expereicene that inment an toxic alochol smell.  Would be nice if the cans were a little taller so as it burns out you can still see the fire roaring as when their first lit.  Gives off a nice amount of realistic heat.  I like the fact that you can put them out (and re-light) with replacing the lid if you you are going to be away unattended.  Stock up