Do you have the GP in white box with the Blue letters or blue box with white letters?I tried out a Gillette Platinum today on the Windsor. What a great blade and fantastic shave. Smoothest blade I've tried on the Windsor so far while being plenty sharp to maintain the same shave efficiency. Left my face like glass and zero feel of any irritation.
I really love Bic's on every razor but one issue I don't like is that the first shave is not the best. It's awesome after shave #2+. The Gillette felt perfect on the first shave!
Great recommendation!!