When you need high feeds, don't go deeper than half the width! If you want to make a deep cut, be prepared to work very slowly! I don't mean it's bad, but it doesn't tolerate mistakes and breaks with great ease. Watch your feed and depth and the cutter will machine beautifully. Excellent chip evacuation and seems to be holding the edge well. Very few end mills this thin have a cut this long, so this is one of those tools that you'll definitely want to have in your toolbox, but it also demands a lot of respect.