OK, I installed 2 of the 8 inch in walls this weekend. All in all, they are decent. The build quality felt a little less substantial than the Parts Express speakers, but only barely. The speaker cone itself seemed well built and was the yellow kevlar type weave.
I did hook them briefly as fronts and they sounded nice with good range, but could not do any A/B switches or anything critical. In my opinion, they would be OK for most systems in living room applications, especially using a sub. They did seem to have good high end and sounded crisp. Also, due to mean framing guys, one of the stud bays was only about 9 inches wide so I had a slight difference in sound from the 2 due to cavity size. I had to cut the built-in mounting tabs off and screw directly to the stud to make it work.
My friend had bought a pioneer 1017 receiver and when it went through the automatic test tones, the speakers certainly sounded fine in the test sweeps compared to the Boston Acoustics CR7 bookshelf speakers used as fronts. Even the mid-bass pops that the receiver put out for some of the tests did have some oomph. Again, the difference in cavity size was apparent between teh 2 back speakers using test tones, but the receiver actually did a decent job of accounting for that and equalizing automatically. I was pretty impressed.
They are a good value for the money in non-critical listening applications and I would have no hesitation recommending them for normal living room systems. Are there better speakers out there - most certainly, but for someone with less than ideal listening conditions and a sub, these will work fine.