I've been on AWS micro instance plan for a couple of months, and bought a reserved instance at $54 yearly which is boasts economcial of 61% utilization. I don't find it so.
A micro instance plan from the handy calculator is $14.64
My monthly charge is around $7.55. With the reserved instance, the total cost is around $12. So I save about $2.5, hardly 61%.
I see better deals like this for $10 monthly which offers double RAM and space.
Also, I think you should remove the we can use Amazon Free Tier with Micro Instance cos we can't.