We've only had these for 6 practices and one game. They've been holding up great with all those little cleats running over them. I like that they are thicker & heavier than other brands I considered. However, I wouldn't use metal cleats on a rubber product. Really, for the same price there are many products which are inferior as far as thickness & durability go. Also, the "tread" on the bottom helps keep the bases in place. Obviously, if the grass is wet or the dirt is dry, they're going to slip...these aren't designed to compare to a secured base. Don't have unrealistic expectations. Still, I'm loving our set & think it should make it through the season. They fit in one of my baseball gear bags, but then it becomes too heavy & no room for helmets or catcher's gear. Got a collapsable wagon for the bases, tee, net, & gear bag.  Some have complained about not having a pitchers mound.  It'd be a nice inclusion, but for tee ball, we don't need it. Besides, temporary mound rubber would only mark distance, not give a push off point. I'd like one, but it doesn't seem real necessary for the price.