Easy Peezy install. Took all of ... 15 minutes (not counting the trip to parts store for a replacement PCV grommet & extra hose. I think it took me more time to decide where to mount it than it did to install it.
I'd say that probably 90% of peeps that install them do it just for the bling in their engine compartment (as opposed to 'needing' it). Most of the advertisement hype is just that ... hype. If you need to get rid of the PCV though, it's a good option.