I REALLY DID NOT THINK MY FRENCHIE WOULD ADAPT TO THIS SO QUICKLY, BUT THE VERY FIRST TIME WE PLACED IT IN HIS PLAYPEN HE USED IT AND HAS BEEN USING IT Ever SINCE. BEST INVESTMENT FOR HIM SO FAR! I HAVE HAD IT GOR ABOUT A WEEK AND SO FAR I DO NOT NOTICE ANY SMELL LIKE SOME OF THE OTHERS THAT HAVE REVIEWED, SAY THEY HAVE. VERY EASY TO CLEAN.