This plugin works flawlessly as it should. It makes adding more than one featured image a breeze and having tried 5 different solutions so far this week, this one is the easiest, best and most user-friendly solution that you will find.
If you want to add multiple featured images, try this out, you won't regret it.
Oh and Ankit's support is second to none. I sent him an email and received a reply and a solution within an hour or two - excellent work man, keep it up!