How on earth can you give a review in less than 100 characters? If you want to say the restaurant is good, a review worth reading would say why it was good. What was the food like, what about the service, the ambience? If you want to say it was bad, why was it bad? I am in favour of raising the number of characters necessary in order to make a review worth reading, not decreasing them. There are so many of these "tweet" reviews out there that say nothing, are not at all helpful and I am not in favour of increasing them.