Terrible compared to Phillips blades on my course beard.
I ordered these to replace the original blades from my 300 series.  The reviews were good so I thought I'd save some money.  Admittedly I have tough, course beard hair, but these were worse than the 18 month old, dull originals I was replacing.  I tried all kinds of ways to get them to shave well (light pressure, hard pressure, quick circles, slow lines, etc).  Shaving took more than twice as long and still left behind stray whiskers.  The shave was also not as close as before. I oiled them regularly and followed the instructions.  After about a week of daily use I gave up and just ordered new Phillips blades.  When the new Phillips blades arrived the difference was palpable.  Total shave time dropped to about 60-90 seconds with new Phillips blades.  It had been 3-4 min with the dull Phillips blades and 6-7 minutes with theses Corablades.
Rating: 2 stars