Summary: I use the P8Z77I with an Intel I7 3770K for a compact workstation that I use for statistical analysis, optimization, and visualization of my stock portfolio. The entire rig fits in a tiny Silverstone HTPC case and is extremely quiet with Noctua fans. Easily overclocks with the ASUS bios. I'd totally recommend this board and I can't wait to try the 4770K in the ASUS Maximus VI Impact.
Summary: I was looking to downsize (physically) my desktop pc and came across this board. Asus has always produced a good set of motherboard products and this is no exception. Popped this into my case and was off and running. Fits perfectly, all my components had no issues fitting. Additionally, there's a great set of connections that cover all the bases. Overall a solid performer with a great feature set.
Summary: I purchased this to go into a portable gaming rig (Bitfenix Prodigy case). Asus has managed to pack quite a bit onto this extremely small form factor. Most importantly, the CPU socket is set more or less in the center of the board, rather than right up against the PCI-E slot, meaning this board can fit some of the largest aftermarket coolers, including the Noctua NH-D14 and the Phanteks PC-TH14 series.
Summary: Asus always deliver, this Mini ITX board is in a small case with i5 Ivy Bridge running Win7 Pro and has an SSD and 2 X 2.5" drives for data inside, it's a powerful, quiet, low-power usage unit that is easily moved around. I like that Wi-i & Bluetooth are on the MB too, just get some better antenna - the supplied ones are a fiddle. I don't need to overclock, but this board will do all that if you want.
Summary: I bought this for my first computer build and it worked great. The only con that I've found is that the case audio header is right next to the pcie slot, so if you have a dual slot graphics card (like I do) you can't use the front panel audio connectors. But all in all a great buy, especially for the built in wifi and bluetooth.
Summary: I got this mobo new for $125 with shipping included in the price. I cannot argue anything about that when retail prices are generally up in the $180+. For those that want this mobo, you will need to download the product support stuff from asus website to get internet connection. I opted not to update bios, since updating bios is risky and most of the times never needed. The only con I had since I got it was the bluetooth.
Summary: I bought this for a custom build in a custom case. The daughterboard might be a concern if you have a *very* small case height-wise, so you'll want to make sure you have the clearance. I'm running Linux on my build, so most of their features I'm not using, however: from a purely hardware-perspective the thing is rock-solid. I have a 160W Pico PSU powering it and have had zero stability problems.