Great addition to our deck!  Ended up replacing the lava rock with multicolor Fireglass (preference).  Started using it as soon as we received it.  Very Sturdy, heavy top.  Read other reviews about the cover.  I haven't had one problem with it, has not ripped.  Line up corners to put it on, goes on easy.  Have received many compliments on it!  Looking forward to using again this year!  Really like that it encloses your propane tank.