I have so far been able to get around needing the HDMI detective due to proper power on sequence with my devices. However, trying to perfect things, I wanted to get a device like the HDMI Detective that would work for me. I tried 3 devices:
Gefen HDMI Detective
This was my first choice, it was able to be powered by HDMI, was built nice and able to be ordered with Amazon Prime (so I could return easy it if it didn't work).
This device had issues with HDCP passthrough with my Nvidia GTX 680 (and my 580 when I had it). Nvidia control panel would show that everything is HDCP compliant, but the moment I'd go to watch HBO, I'd get an HDCP error. Everything else seemed to work right. I worked with Gefen on this for a few days and we were not able to get it to work. They told me they would research it more and then call me back once the fix it--I haven't heard back from them yet.
ConnectPro HDMI EDID/DDC Video Ghosting Emulator TMDS-EDID-1
I bought this device right through the company. This device worked with HDCP, but had other issues. Power of HDMI did not work. Sometimes when I would start everything up, my sound would work on the computer, but my receiver would not output the sound--I had to turn the receiver off and turn it back on.
When using this device, my receiver always reported it was receiving YCbCr 4:4:4 and not RGB--no matter what I set my Nvidia control panel to. Without the device, the receiver reports everything properly. However, colors seemed to look identical even though my receiver was getting the wrong information.
The device would my my Nvidia driver think that the HDMI was DVI (it would show DVI in Nvidia control panel) and sound would no longer work. I would have to restart the device and/or my computer to fix this.
I sent the device back.
HDFury Dr. HDMI
Finally... a device that works. HDCP works, my receiver shows RGB 4:4:4, power over HDMI works. This device is the most expensive--hence the reason I tried it last.
The only issue I have with this (and it happens without the device too), is Windows 8 loses my audio sometimes. Restarting the Audio Services does NOT fix the problem. I have to reboot to fix it. I thought this device would fix that issue as my computer should never lose its connection to the receiver (at least it doesn't think so). Maybe this is happening because the power over HDMI only works while my computer is on, so when waking from sleep, the device takes a couple seconds to start up. I'm wondering if sometimes my computer looks for the EDID information before the device has started up completely. I will try keeping the device always powered via USB if it happens again. It only happens like once out of every 10 wakes.
Anyways, my vote goes toward the Dr. HDMI so far. Although, it'll be upsetting if it can't fix Windows losing its audio after wake sometimes. I'm still using it, so time will tell.
I hope this helps anyone considering these devices. It took a bit to try all three--especially since two of them ship from Taiwan.