Gillette Fusion5 ProShield Men's Razor Blades, 4 Blade Refills

Q: Are the blades the same quality as the proglide as far as quality?

The Proglide Shield blade gives a smoother shave and the blades last longer than the ProGlide.

Q: Will these carteidges work with the fusion proglide power handle while the handle is on? Will the vibration of the power handle work?

Yes on both. My husband had the fusion power and it worked along with vibration

Q: Do Proshield blades work with a Fusion Power razor?

Yes, in fact, that is what I am using them on.

Q: Is this an official P&G product, and if so, how do I know?

That's a great question. Counterfeit Gillette blades are RAMPANT on the internet and hard to spot from packaging or appearance. I assume I'm fine if I'm buying directly from Amazon--their reputation is too valuable to risk on selling counterfeit products--but I'd say it's a roll of the dice if you buy from a cheaper third party seller.