Just to comment on mine so far;
Amazingly easy to set up - pretty much plug in and play.
Integrates with apple remote which I think is really cool.
The supplied aerial (about 10cm in height and has 2m cable) amazed me at what I could get with it, I was able to pick up all digital channels except mux2 (from Crystal Palace emitter). All signals for me are about 80-100% signal quality, ~60% signal strength. 3-4 channels can be glitchy at times, but just find a 'hotspot' for your aerial and set it up there. I'm sure set top and roof aerials are definately better.
The eyetv 3 software that came with mine has an excellent UI, it was modelled on itunes I believe, and supplied instructions if you get stuck.
I have not tried out any recording yet, I'm still in awe from watching tv on my mac😀
Overall amazing value, 5/5
Well done elgato.