The Natural 75 feels by far the best when compared to the other stiffer grasses I've seen, but does it hold up over time? I'm definitely getting a GST product, I just want to make sure I get the right one for a lighter use backyard (25 x 33 rectangle) for kids to play on, and heavy sun contact. This grass feels so soft and way more comfortable than the other ones out there, please help me understand what upkeep differences, matting and any other factor that would dissuade from going with this line over any other of your names. Thank you!