I've only had these mats for a few weeks and it's the summertime right now. They look great and fit very well. The real test will be during the winter with the rain and snow. So far I like them, and I would recommend them, although, I thought for rubber mats, they were too pricey. I went ahead and bought them anyway, because of the on-line positive reviews and warranty.
2016 Toyota Sienna Floor liners from WeatherTech
Nice floor liners that fit well if the middle row seats are slid forward all the way. If slid back for max leg room the liner is too short. Same goes for the extended floor liner for the rear area. It seems too short to fit the floor space. I have not tried the rear sear liner because I normally don't use that rear seats.