Gillette Mach 3 are the worst you could use (IMO) even the wilkinsons sword are far better.
I would disagree! Complete opposite for me.
Mach 16 gives smooth and quick results. Never hurts, burns or anything.
Wilkinson sword is painful. Seriously painful. It felt like it was completely removing the whole face. As well as individually plucking out every single hair. And to top it all off, It was no where near smooth. Tried 3-4 times a couple of weeks apart, and binned it. (It was their titanium one iirc).
I do believe that finding the right gel or foam for you is important. Try them all.