Ok, so it's not the best curry I've had in my life. I've lived in Asia, dined in posh Indian restaurant like the cinnamon club and there is no doubt there are better curry out there.
But you'll have to put things into perspective. It's a take away restaurant, not competing for a Michelin star! And it's in middle of a small rural town. And when you consider that, I think their curry certainly tastes much more flavor some than any other takeaways (and restaurants nearby), with decent potions and friendly service. You can see the kitchen from the counter and its a reflection of their confidence in their own cooking.