They came on a used bike and ive had them for a year and a half. They really last and don't wear down a lot. They are soft and grippy even when wet.
Water can sometimes come in the sides if you ride for a lone time but that's the only problem.
Very good they've lasted a long time and the only reason I'm replacing them is because I have crashed a few times and they were cut so water gets in when I ride and they slip around. They still haven't worn down all the way after a year and a half.