OK, finally installed a system. Some more impressions:
1. Cabling is a nightmare. But that depends on your MB and PSU.
2. Why oh why can't I run my HDD power from PSU to lower HDD cage without going into the MB compartment first?
3. It does not seem possible to run cables along the back.
4. I posted a picture of the screws and where to use them. Read idiot's thread regarding his P180 disaster if you have any doubts.
5. I'm running without the lower fan for now. The HDD reached 41C degrees before I panicked. I opened the front door and lower filter door, and removed the filter. The temperature is now 34C. Closed filter door, filter removed, front door open - 35C.
6. The power LED is visible with door closed. HDD activity is only visible with door open unless you bend down and look into the side of the front bezel. There are two HDD activity connectors and no speakers. I used
this to get the POST beeps in case of trouble.
7. Getting the rails in the right position is a little trial and error. For both floppy and optical, use the hole on the rail that will place the front of the rail as close to the front of the device as possible. For optical drives, use the upper of the two rows of holes. If these instructions sound too cryptic, don't worry, just try it out.
8. Bend-to-break plates on the external bays are not great. But at least they break off very cleanly - no jagged edges I could detect. Requires a fair amount of bending back and forth though. No way to re-attach.