Feature:
They seem solidly built, and they're not as heavy as you might expect. The speakers actually have more features than we're utilizing, so that's a good thing.

Quality:
Excellent! I wish my car was built like this thing!

Value:
After lots of research I can tell you, this is great value for the money, and they're JBL's man!

Desirability:
It's a subwoofer. Guitars make me weak in the knees (OK maybe a Marshall stack or an old blonde tolex Showman have that effect too), but a sub's a sub

Sound:
The bass is warm but not muddy. We really like the way these subs compliment our mains.

Ease of Use:
Very easy to use, plug it in, set the volume and you're there. As for the manual, it's typically confusing with too much of what one doesn't need, and not enough basic info. As long as engineers write manuals, musicians will continue to be mystified. The good thing is, that Zzounds tech service guys will help you at the drop of a hat.

Support:
My support comment is about Zzounds. I researched these and other subs by sending out e-mails to Zzounds and the other big internet music stores, describing our present sound configuration and asking for advice and suggestions. Only one company graciously spent time with me on the internet and on the phone. They helped me to not only find the best fit for our system, but also HOW to make it work most efficiently, and WHY it would. Thank you guys, we will always shop you first in the future.

Overall:
This pretty much does it for our current PA config. I think we'll just replace these when they wear out, which I hope isn't for a long time.