I have to agree with Ben here - ehi passiko; see for yourself if this is right for you, and then decide. I had the same preconceptions before I went on my first retreat as to whether it was too austere, too much of a cultish elements and too many rules; or whether I would just go plain crazy - but I was wrong on all aspects.
The teacher's advice was appropriate, the accommodation was clean(in NZ), and the food delicious. I learnt about the importance of aditthana (strong determination) and upekkha (equanimity) in 10 days than what I would have learnt in 2 years of reading Dhamma books.
The technique and quirks of a Goenka retreat is not for everybody, but you should give yourself an opportunity to see if it is suitable for you.