Ive had this mat for months and havent had any issues with it. I normally wash it about once a month with a power washer or regular water hose and it looks brand new.  I even used it during the winter months and when spring arrived I gave it a good cleaning and it looked brand new.  You wont be disappointed with this mat. 
* please check the meaurements because it is large. I have always had smaller door mats but since I purchased this one I wouldnt use anything else.