Hey guys I got a 92 s 600, and I was wondering about hp chips? Are they good? NO good? Damage anything? Just wanted some advice, and what you thought about this one?

Thanks in advance.

http://cgi.ebay.com/ebaymotors/1992-1995-Mercedes-Performance-Chip-S600-SL600-600SEL_W0QQitemZ290056338510QQihZ019QQcategoryZ33597QQrdZ1QQcmdZViewItem