We went a couple of years ago.  It was OK, nothing like Cirque du Soleil but pretty entertaining for the value.  The tent was a bit warm so dress lightly.  Go early if you have little kids.  They taught the kids something like spinning a ball on a stick during pre-show.  
My kid got bored halfway.
The whole arena was pretty small so no need to get VIP/front seats unless you want to be up close and personal with the clowns.