I prefer long-wearing, bi-metal bandsaw blades, but even these dull quickly with heavy use, requiring that you push harder and harder to produce a cut, which wears out bandsaw tires and bearings and causes the blade to drift offline. At that point you have three choices: You can buy a new blade, send out your dull blade for sharpening, or try to sharpen it yourself. There are automated blade sharpeners, but they're expensive and generally designed for bandsaw mills with blades 1 in. wide or wider. Like most woodworkers, I use a 1/2-in.-wide blade for general bandsawing. So I came up with my own jig.
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