India Garden serves decent Indian food at reasonable prices. It's menu is extensive, and like many Indian restaurants I've been to, they tailor their dishes according to your individual spice-tolerance (a plus for people who can't handle the hotness).
However, the service can be unfriendly and very slow, especially during their late-night hours. They turn up the volume on the music, making it difficult to hear conversation, and I've also noticed that their meal portions get smaller during late-night as well. There can often be a considerable wait after 11pm, especially for larger groups.
Despite this, it is a good place to go for cheap Indian, and a good alternative to some other half-price options in Oakland.