What are peoples thoughts on a writer directing their own work?...from experience.

Pro's - the intention of the piece has the potential to be articulated to it's best ability, depending on the skills and experience of the writer as the director. Cons - the piece is mutated and changed endlessly as the writer/director progresses to new ideas, developments and starts to see the piece in a different light etc. I recently worked on a show that had the creator also staring in the show. This person was not the director, however the influence that this person had over any creative decisions was overwhelming. Parts of the script were cut, lines were revised, the intention of the show from opening night to finale shifted. It was hard to tell whether it was a good or bad thing, as a crew person of the show, I saw these changes every night. Admittedly, it was frustrating, because I would always have to make changes on my end of the show when I had only just come to a point where I was satisfied with my work up until that point. However it was also great to see that this new piece of theatre was being taken seriously and developed in order to achieve the best possible result. This wouldn't have happened had the director and writer/star-of-show not collaborated and shown they were not afraid to make changes. It was an interesting experience. My 2 cents