Also, in my modest experience you might want to try the following, if you can't get decent results:
- Cool down your bowl and whiskers some hours before using them
- Add a level teaspoon of starch for each 500 ml of cream (it acts as a stiffener)
- Get better whiskers
- Beat on high for a short period of time or it will turn into butter
Now I am gonna prep a cup of hot chocolate! The starch is the secret for that, as well.