i believe that paintball usa simi is a great course and its alot of fun. the only big problem is that its all dirt (no grass) but thats ok just less sliding. all of the refs there are fair and i love miss kims hair. the problems with rocks is that its hard to slide but you can and i did and i ripped the crap out of my pants and my a#* but hey what the hell thats paintball for you.another good thing is that its cheep even if you bring your own paint and your own lunch unless you like pizza. there are alot of regulars there (people who go alot) that makes it fun cause your playing with friends. i also like that you get to fill your own compressed air thats quick and easy. i would recomend this course to anyone even beginers. they have there a jungle course, hyper ball, air ball, and speed ball. if you ever see anyone with a mini mag and his shirt off thats me, dont be scared to say whats up.