Just use the right lube and spin at the right rpm and learn how to sharpen them and they'll last many years.
It doesn't matter what type of bit you have, it how it is sharpened. I work Tool & Die, I have a cheap set of bits, that I have had for 5+ years now, as long as you keep them sharp they will keep working right. If you looking for a really good set look for greenfield drill bits. I know our Cnc area uses them, I have a set of there numbered drill bits.Looking for a set of drill bits...something GOOD that will drill through a truck frame without getting dull every pass. Any suggestions on a brand?