If you're talking about India's Visa on Arrival, I've done it successfully while entering at Mumbai. You still have to fill out lots of questions on the online form, about as many as used to be on the standard Visa app, but you don't have to send everything to the Indian Embassy any longer, which is great.
The counter for "on arrival" was empty other than a couple of other people who were using it, and it took about 15 minutes or less if I recall. It was clearly marked on where to go. This was back in February.