There are more than two sections to West Irvine, Ipop.
South of Trevino (and north of Irvine Blvd) is the main part of West Irvine, that falls under the Master association. $45/month currently for that association gets you access to the pool and pays for the upkeep of the parks, greenbelts, walking trails, tennis courts, and all of the landscaping/lighting 4 feet from the curbs to the streets. Andover, Mandeville, Wisteria, and Summerplace, as condos, pay a second association fee to maintain common areas within each of their sections.
Between Trevino and Portola is the Independence section of West Irvine. Independence is a group of tracts and has, as bk pointed out, a very patriotic theme in names for streets, tracts, and even individual models. "Independence" can also be thought of as "independent of paying association dues." To some this is an advantage and others a liability, depending chiefly on the amount of "deferred maintenance" that neighbors have accumulated, with no board to slap any wrists. There is also no pool priveleges unless you've got one on your own property.
The third is the gated section of West Irvine; Sheridan. The condos behind the gates go for less (on a per/sqft basis, generally) than the ungated condos mentioned above. The SFRs behind the gates have relatively low turnover and have so far held fairly well in value. So far. The gated Sheridan area has it's own association pool and park, as well.
All are served by Myford Elementary, Pioneer Middle School, and Beckman High, which are Tustin Unified Schools. Each of these has scored well in index testing ratings. Not as high as Uni and Northwood, but very good, nonetheless.
I like the fact that I am not paying for guards and gates when I live in such a safe city, already. Mello Roos is $500/year for my place, and not $400/month VoC-style. Good location for what I need, and close to my wife's family (and a happy wife = a happy life!)
/pitch