I bought many items from snapdeal its item delivery service is good and discount that they gave us on some product are un matchable with others in same segment.
But sometimes they are costly then offline store for example I saw micromax product on it which listed at 4500 something on it but same set are available in market at much less price nearly 700.
I dont remember the exact name and price of it now but I can assure you that on some item they cost more then there market rate so better to check on other sites to get the best deal . overall its a good shopping portal.