The proof is in the eating.!! and I will soon be feasting on AGTM chips so we will see. Thank you.

But Boyan I have to disagree with you because I've tried many of the cheap cutters off Ebay and they are rubbish.!! . . . Cutters are not cheap when they go dull 2hrs into 6hr job or snap at 5hr58mins and wreck the job.!!
Drillman sells cheap endmils but are you 100% sure they are Kyocera or there rejects.? Maybe maybe not and it's this unknown that can't be trusted and when I'm cutting £300 piece of aluminium with 6hrs machine time I can't take that risk.

Even at DIY level I feel it's foolish to buy cheap endmills unless your first learning so still wrecking with wrong F & S or crashing into things (which I never do of course.) as again lots of time and effort invested not to mention material can be wrecked for the sake of £3-5 more. Then you have machine stress to factor into the equation.!! . . . . Just not worth it to me.!!