True or false

Today I went down to dealer to pick up a couple qts of ATF for the wife 96 Civic. I was talking to the parts clerk and they mentioned that Honda power steering fluid is most important OEM fluid to use becasue any other P/S fluid will destroy the rack. I've yet to have a need to change her p/s fluid but you never know. So is this true when dealing with p/s fluid?

Also, can I use a good quality after-market 02 sensor (bosch, etc) if any is available or should I stick with a OEM sensor?

Also, are there any Honda dealers on-line that gives discounts to forum members?