I recently built my new machine using a 900, and it went together like a charm. When you get your case, lay everything out on a surface where you have plenty of room and mentally plan the steps you want to go through to put everything together.
The biggest problem with this case is cable management. Many people have cut holes in the back plate to run cables through, but I would warn against that for your first time. Get yourself a role of blue painter's tape to use to hold cables out of the way temporarily while you're putting things in. You can purchase some small zip-ties and adhesive zip-tie mounts at a store like Home Depot (look in the electrical section), and use these to route your cabling where you want it.
I decided not to cut holes on this first build, and routed most of my cabling in the space between the motherboard and the drive cages in front, using the zip-tie mounts to bundle the cables up and keep them out of the airflow path as much as possible. You can also zip-tie some drive power cables to the front side of the hard drive cage where they won't show when the cover is put on.
Overall it is a great case. The airflow is spectacular, enough so that I have all the fans on low and it provides plenty of cool air for my overclocked components and is almost silent. Yeah, no Power LED or speaker. I miss the beep, but as deuce said, the fans are all the power LED you'll need.
My system: S939 Opteron 170 @ 2.7Ghz stock voltage w/ Tuniq tower, 2Gigs Corsair XMS DDR400 @ DDR450 stock voltage, EVGA 8800GTS640 Superclocked.