I agree that EVM (Electronic Voting Machine)plays a very big role in the elections. there are many advantages like fake votes.
Also it takes very less time to count the number of votes for the parties.
the counting error is none as it is electronic item. becasue most of time if the two party candidates are having very less differences in votes, they can go with recounting and do some thing to win. so these kind of error and frauds are negligible if the machine is used for the voting.
But still there are many villages where the EVM is not available. So still there is the chances of fraud at the polling booth.