B.O.B. vs Heavy Bag

Anyone have an opinion on the Century Body Opponent Bag versus a standard heavy bag for intense strike training? I would have to hang the bag from a post, and probably lash it or chain it to keep it from swaying, which means that there’s always the risk of slipping past the bag on a kick and cracking my toe into the post. The Century B.O.B. looks nice, but I’m concerned with its stability from particularly powerful kicks. I don’t want to send it through a window or a wall.

I realize that the BOB would be more effective for precision training, but I’m interested to know how well it holds up to sustained abuse and powerful strikes. I’ve heard putting sand AND water into the base will help its stability also, but I still wasn’t sure how effective that would be overall.

Thanks for the input.