Octopus overflow box

[redtailshark1]

I was just looking for an overflow box that will fit over a 70mm tank brace and i found a octapus OB-300s
http://www.thereefshop.com.au/index.php?main_page=product_info&cPath=20&products_id=1188
i was just wondering if any body has used one

 

[redtailshark1]

i guess nobody