It is quite cool, lots of interesting routes in, lots of cool things.

but ALL Rocks have a script to run it as simple, in a shitty to good server, this will CRIPPLE it with 30+ people, even at 20+ people. Make sure to remove all the simple script. The rocks do have a impact on FPS, but its actually quite good (tested in singleplayer)

QUICK EDIT, LOOKING INTO IT THE DAY AFTER
The script in the rocks probably do work (to lazy to test, do it yourself), but if you set the object to local, you have a endless cycle of "Object is spotted, its now simple, tell the rest of the server its simple, now its a simple object for every single person all at once, but its also labeled as local so its still being processed local" shenanigan's, dont make the rocks local, it probably will help...