I know I see this place mentioned whenever anyone asks about Indian food, but I really don't think their praises are sung highly enough. About 2 months ago I had the extreme displeasure of having lunch at Royal India downtown. We ordered off the menu, and I was floored when the check came. $50 for two people, eating vegetarian food for lunch, with no alcohol involved - and the food was exceedingly average, adding much insult to injury.
Surati Farsan, on the other hand, is always good, always fresh, and incredibly cheap.
Today I stopped by on my way to Ker, and got two items that were relatively new to me: khandvi, and ragda samosa. Khandvi is only available on weekends, and is made from garam flour, steamed in flat sheets about 1/16" thick, rolled up, topped with mustard seed, sesame seed, fresh cilantro and coconut, and served with spicy cilantro chutney. Ragda samosa is two samosas (awesome), filled with spicy vegetable curry, and served in a bowl with curried peas, tamarind chutney, and fresh onions.
Both were great. The khandvi are really refreshing, served cool, but spicy from the seasoning. The ragda samosa was also quite spicy, but the sweet/sour of the tamarind chutney made it a lot more interesting.
Other items I've had here that were great were the masala dosa, mysore masala dosa, idli sambar (steamed lentil flour bread with spicy soup), and khaman.
Definitely don't miss sampling some of the sweets. In particular the penda are good (yellow discs made from solidified milk), and the koprapak (coconut, sugar, and cardamom seeds).
Prices here are crazy cheap, too - my dinner tonight was under $7. Two can eat very well for under $20.