I just got a full set of WeatherTech Digital Fit floor liners. They are a very nicely made product.
Unfortunately, they come with holes to mount to a carpet stud or hook. That sort of defeats the purpose of the high side walls designed to keep all the snow, water and salt in. A very simple redesign would solve that issue. Also, depending on the model they are for, they are "cut" short in certain areas, like around my gas pedal. The same applies to the front edge of my rear floor liners.
Would I still buy them? Probably, although for what they are, damn pricey!