Summary: After a few months there was nos sound coming out of the CBL/SAT port. I switched to a different port, it worked for a while and then there was no sound out of that one either. As I am living overseas there is nothing that I can do except junk it and never buy Onkyo again.
Summary: Onkyo is total junk. This is my second one and both are broken. First one was an Onkyo HT-R667 and it broke right at one year mark just in time for it to be out of warranty. The hdmi ports stopped working and now it only works with RCA cables. I decided to move it to another room that has another TV that is not used too often but it will do the job. Here is where I failed, I bought another Onkyo.
Summary: This receiver is great insofar as sound reproduction, it tends to run pretty hot; very, very hot. I gave it two stars because about 24 months after I purchased it the sound stopped working, completely. I checked online and found others who had the same problem, sound mysteriously just stopped. Everything else turned on and looked fine, but the indicator that displays how many speakers are connected is blank and there's absolutely no sound.
Summary: Its been 5 days now, I hooked this up with Energy Take Classic 5.1, Samsung LN46A850 and PS3 80GB Fat one. As of now, I am ok with 5.1, I think 7.1 is a hype (fact - no place in my apt :( ) and not many movies are with 7.1, but got this receiver just to be future safe. o The sound is clean and crisp, I was expecting it will be loud.. but good enough for my small apartment. o Networking - Works clean as expected.
Summary: I purchased the TX-NR708 on Jan. 1st, 2011 and now less than 5 months later I'm sending it in to be serviced for a second time (at $30 each time for shipping). The first time was after just 6 weeks when the unit would not power on (just made a clicking sound when attempting to turn it on). This turned out to be a faulty 12 volt relay. Now, as many others have reported, the unit's IR receiver is no longer working.
Summary: I won't go into details; I actually have not gone into much of what this receiver can do. I set this up in one evening with 5 HDMI sources and 1 Component source as well as set up the internet radio, AM/FM radio, DLNA connection to media on a home server, and the automatic tuning. All of this goes to a single HDMI (upconverted) out to a 46" TV. My set up is a 5.1 system at the moment. I almost had no problems installing the above and have connections to spare.
Summary: February 1, 2010 update: My HR-21 problem appears to have been corrected by a DirecTV software update. Today both DirecTV channel 103 and 106 work through the Onyko TX-NR708 HDMI connection. I bought this TX-NR708 to replace an excellent performing TX-SR804 to gain the new 3D capability with DirecTV's added 3D offerings. However, it will not pass the DirecTV's 3D HDMI output to my new Panasonic TC-PX65VT25 Plamsa.
Summary: I chose the TX-NR708 because of its video de-interlace and up-scaling features. Who'd have thunk a modern flat panel Samsung PN63C7000 63-Inch 1080p 3D Plasma HDTV (Black) would display 480i as 480i? It looked awful! My old PRO-510HD would de-interlace 480i and display it really well. The TX-NR708 certainly resolved my Samsung's 480i issue. The TX-NR708 can up-scale everything to 1080p - but interestingly not everything looks better at 1080p.