I'd hesitate to advise anyone new to the route of "one and done." With many blades I've tried in just over a year of DE shaving, I'm more comfortable with them on the 2nd and 3rd shave. I'm pretty satisfied with Feather, Astra, Gillette Platinum, Shark, Persona Red, and even Derby. Many of these degrade for me around shave 6 or 7.

You've found what works for you, and maybe some others. So must we all...