Before I have the Hydro 3 discovered I had shaved me for years with Gillette Mach3 as the fusion simply overpriced and were not much better when shaving performance, although still slightly better gliding over the skin. The more I was amazed when I tried out for the first time the Hydro 3: because of Gleitgels instead of a sliding strip is created between razor and skin a smear layer, which makes shaving more pleasant without the shaving performance would suffer. Although I use continues even beaten shaving cream and shaving additionally, but in fact it would be enough the skin only to moisten with water.
That it can happen for some little "greasy" together with the shaving cream, may be, but in my opinion is not a knock-out criterion, especially since the shaving thereby gently several times. I even found that you can compared to Mach3 shave much rabid with Hydro3 without overlap - the "Protecting Skin Guards" seem therefore to function, even when you push the razor against the skin, although one actually this is not should do.
Another advantage is that once the gel reservoir is depleted, one blade head still can loose continue to use for a week, because unlike a normal glide, the shaving head can not be dull and hold the blades considerably longer than that of Mach3 and the fusion of.
Do not be fooled by the Gillette fanboys and certainly not by the Stiftung Warentest, but try it out for yourselves - it's worth the years seen simply because of the cost savings in replacement of the blades.
From me there is an absolute buy recommendation, since I use this shaver for a long time and know the competition. If you want necessarily a precision blade for hard to reach places have, so you can grab even the slightly more expensive Hydro5, or you still have a good old Gillette Sensor Excel at hand, which due to its narrow razor blades and the cost is also highly recommended.