Summary: Not really thrilled with this purchase. Razor only has 2 vibrating blades under the appearance of the 3 foils. There may be something that moves for the third, but I don't see it nor does my beard realize the results. The 4th blade is only for the long hairs and on two days growth works pretty well. I've tried the "wait 30 days" and it is not satisfactory for something costing this much in my opinion.
Summary: I've used a blade for 50 years, largely because my whiskers tend to grow out "flat" on my neck and jaw line. My brother asked me if I still used a blade - his whiskers grow the same as mine - and he raved about this Panasonic. After one nick too many I took the leap and bought the ES-RF31-S. I'm truly delighted with it. I haven't used the wet/dry feature yet but the shave is smooth and blade close.
Summary: The ES-RF31-S4 Shaver can be used wet or dry. It can be used in the shower or in your car. Doesn't matter because it does not work worth a spit. I have tried just about every product assist I can find and nothing seems to help. It takes so long to get a half-way decent shave that I'm afraid to try it in the shower because of the wrinkled skin and the water bill. It was suggested I use this product for at least 30 days to get used to it.