I just bought these and installed them today. They are replacing some Focal 165HC coaxials running off an old school 5 channel Alpine V12 (F353, 120watts x 2 front bridged, 150watts x 1 sub). This is also in a small car, with glass very close to me and the tweeter as well; a Miata.
The Focals in store, in comparison, and in my car are BRIGHT. And, as they say, their midrange is "colored" in comparison to the more "natural" sounding speakers. (Usually, paper cones sound that way.)
The JL C5s, in comparison, lack either flaw. No overly bright tweeter, and no tinted midrange - and not at all more expensive.
After installing these, running a 80Hz HPF, 80Hz cross to a 10" sub in the floorboard (close!), and gettin it semi tuned (almost 0 adjustment necessary) it delivers an excellent soundstage, off axis response, midbass, tonal consistency and realism in things like guitars, bass guitars, electric guitars, drums, etc....anything that can wander from sub to mids - these handled whereas the Focals failed to at the same price point.