Installing the BE6 was a rather painless process. While its footprint is a bit larger than the BH6, I don't see it presenting any issues fitting into a regular case. I installed it into an Enlight ATX Mid tower with no problems. I like installing hardware into a system instead of having it on a test bench, that way I can have a clear idea of what it's like installing and living with the hardware in a real world scenario. Granted it's more of a pain in the butt, but I think the pros outweigh the cons.
One of the annoying things that I could find with the motherboard was the placement of the power supply connector. I was forced to route the power cable over the processor.
The AGP slot allows for full length video cards, in other words there is nothing behind the slot that would prohibit a long video card from sitting there.
There are a total of three fan connectors on the motherboard. The first two are in the vicinity of the CPU slot, while the other one is on the opposite end. I installed a Celeron 300A Slot-1 CPU on the motherboard. Now this processor has celery sandwich with three fans installed to take care of the cooling. Three fans make for three separate power cables, which in turn left me wishing for a third fan connector in the vicinity of the CPU slot. So I had to modify the power cables to make all three fans work. Granted not everyone is going to have a 3 fan heat sink on their CPUs, so for most people the two fans connectors would more than adequate.