Pros: Small, Quiet, Efficient.

Cons: No problems yet.

Overall Review: I wanted a quiet, small, low power pc and selected this box to build in. I installed an ASRock H81M-ITX LGA 1150 motherboard and added a 35W Intel i3-4130T, 4 GB of 1.35V RAM, and a 128GB SSD. I installed Linux from USB stick, and booted it up. My kill-a-watt reads 13 watts idling (no counting monitor). One reviewer had problems getting his motherboard in the box. Although it did initially look like it was going to be a tight fit for me as well, my motherboard dropped in easily. One reviewer wanted a larger power supply, but for me 90 watts is probably double what I need. Also, note that power supplies tend to be less efficient when either very lightly or heavily loaded. So a larger power supply would probably lead to more power losses for the vast majority of users. And how many hundreds of watts would you really want to dissipate in such a small box anyway?

Pros: Good price, reliable, seems like a nice BIOS.

Cons: Wake-on-LAN broken with Ubuntu 14.04 or later.

Overall Review: Although the board is Wake-on-LAN capable, as of release 14.04 of Ubuntu the Wake-on-LAN functionality was removed from the drivers supporting the Qualcomm Atheros ethernet drivers needed by this board. And although it's not the fault of ASROCK, I would recommend anyone intending to use this board with Ubuntu AND wanting Wake-on-LAN functionality look for another board that does not use a Qualcomm Aetheros LAN. My understanding of the scope of the problem is limited: I do not know if it affects all Aetheros LANs or only the AR8171, and I also do not know if it affects other LINUX distributions. Other than this, I've had no problems with the board. I owe thanks to ASROCK tech support for correctly identifying the cause of my troubles. But in my case this feature is critical and may force me to replace these boards. (I own three of them.) Newegg does not allow an explicit link, but if you google "Bug 61651 - [regression] Wake-on-LAN broken in alx (AR8161)" you can find more information.