I don't, I have owned and used them before, but there are other lights out there that I prefer to use. I am currently using Elinchrom lighting, but prefer Profoto.

Alien bees are the cheapest lights anyone should buy, they can help you learn and understand lighting better before getting the nicer lights. Their Einstein lights are actually quite excellent, but there are too many things I don't like about the AB lights for me to keep using them.