Kodak Ultra batteries are becoming a market leader, the reason that Kodak are gaining a superb reputation is quite simply because they are one the best quality and last the longest in the premium battery range.
If you have ever bought batteries from the Far East at what appeared to be a great price, you will know that they just don't last, sometimes having to use 3 of the batteries to get the same time as one branded.
So for the sake of a few extra cents get the best, get a Kodak Ultra.