I bought the ACA maps for the Pacific Coast Route when I rode from SF to LA back in 2009. While they're convenient, I can't say that I was terribly impressed with them...

The maps themselves are well-drawn, though as SanDiegoCyclist suggests they don't cover anything that's off-route. Other information is minimal at best. Written directions are extremely short. Mileages are based on the distance from a "matchline" that occurs at the start and end of each map panel rather than a recognizable landmark. You'll need to reset your trip computer regularly, or carry around a calculator, if you want to have any hope knowing how far you are from a given turn or destination.

Symbols indicating bike shops, food, motels, campgrounds, etc. aren't terribly useful. Monterey, California for example is marked with the symbols for "full service" (= restaurant, hotel/model, grocery, post office, gas station), bike shop, camping, hostel, and library. Unfortunately, the detailed map panel for Monterey doesn't show you where any of these things are located nor does it provide many street names. This is the case for all large cities: you'll know they have a particular service available, but the map won't help you find it. I needed to visit a bike shop on my way through Monterey and while the ACA did give me the name and number of the shop I eventually visited, I had to use my GPS-capable smartphone to actually get there!

For the Pacific Coast route in particular, I ultimately found Bicycling the Pacific Coast by Vicky Spring and Tom Kirkendall to be more useful than the ACA maps. I plotted a route using RideWithGPS.com, downloaded it into my Garmin Edge 705, and used that for navigation. I bought the ACA maps primarily as a back-up, in case the GPS failed.