Infinity Kappa 572.5cf Coaxial Car Speaker

I bought these speakers for my 2001 Ford Focus ZX3. I read about them on a Focus site, and found that they sounded excellent at the store.
I have them hooked up to a Pioneer P7600MP for power (no four channel amp--yet). They produce excellent bass and still preserve high clarity for the mids/highs.
I did have to 'convince' them to go into the rear of my Focus. They have larger baskets over the magnets on the rear than factory. I had to grind out about a 1/2 inch strip for them to fit. The fronts popped in with no problem.
I bought them at American-I know someone who works there so got them for cheap. I will be adding a sub, but for now these four 5x7's create great sound.
My explanation for the lower 'ease of use' rating is the work it took to install them. Many places probably would have said that you couldn't put them in; but because I did it myself I didn't have to deal with that. All other features (hookup, crossover, swivel tweeter) are easy to use.