Ive used American Angler, Mister Twister (yellow and green) and the Piranha (blue and white) Mr. Twister. All have worked OK and Ive worn out a few of the first two mentioned. I get the Piranha pretty hot at times cleaning limits of fish now. Ive had it a year. From reviews Ive watched on U-tube the Rapala Heavy Duty for @ $50 will be my next fillet knife. It's stated to be 3 times the knife of all the others mentioned. It's even rated better than the Bubba knives in a few of the reviews from commercial fishermen on U-tube. Time will tell..........