Any plumbing exp? Help installing RO system on sink

just like the title says. I am thinking about getting a RO system off ebay and installing it myself. One with the faucet on the sink and everything. Anyone have any experience with this? is it fairly easy? I have been looking at DIY things online and the wording is tricky but i think i can get through it.

http://cgi.ebay.com/5-STAGE-50-GPD-HOME-REVERSE-OSMOSIS-SYSTEM-RO-UNIT_W0QQitemZ230436435172QQcmdZViewItemQQptZSmall_Kitchen_Appliances_US?hash=item35a714f4e4

any plummers out there?

it should come with complete instructions you may need 110v for UV depending on the type you get , could take it from garbage disposal or dish washer

Pretty easy, do you have a double sink? if not do you have a garbage disposal?