Pros: Inexpensive, small, separate power. Works OK with Mac IF you turn off "Put hard disks to sleep when possible"

Cons: Mac & Seagate "idle/sleep" don't get along smoothly in some configurations, resulting in the Mac losing sight of the disk.

Overall Review: I adjusted the Mac's Energy Saver settings and haven't had any more trouble with the Seagate vanishing. Backups are happening as expected and I sleep better at night.

Pros: The Alfa AP121U works great, if you can get someone to sell you one and send it to you.

Cons: Where do I begin?

Overall Review: Seller shipped wrong item, and the RMA got lost. So I'm out $35 and don't even have the incorrect model that was shipped to begin with. I'll buy my routers from somebody else in the future.

Pros: This is a great upgrade from the cheap-as-hell PSU I started with. It's a significant improvement in system noise.

Cons: The main MB power cable has connectors on either end, plus another one in the middle. You're supposed to connect both ends to the PSU, and the one in the middle to the MB. But one of the ends matches a power connector on the MB, so it looks like you could daisy-chain. That's NOT what you're supposed to do. Installation would be clearer if the whole cable was in a sheath, with both PSU-end connectors at one end, and the MB connector at the other.

Pros: Good price-performance, small & easy to set up.

Cons: WiFi & Ethernet chipset are not supported by open-source Linux drivers; you have to chase down the non-free drivers and arrange to get them installed. Not too hard, but manufacturers should pressure Realtek to open-source those drivers.

Overall Review: I bought this to replace a Foxconn Nano-PC functioning as a Linux server that had developed hardware problems somehow. Easy to install Debian (except for the non-free RTL drivers, and updating the WiFi driver & options) and it's faster than the Foxconn, with 4x more memory. I'll probably buy a couple more to replace other small servers, too.

Pros: I use small WiFi routers running OpenWRT as single-purpose servers: mail, web, VPN, etc. The N600 is adequately fast, plus has a good amount of Flash, so I can configure a fairly complex server. I'll run Apache and WordPress on my most-recent system (the WordPress database will live elsewhere)

Cons: It's a bit of a hassle to build and install a custom, single-service OpenWRT, and a moderate hassle to unbrick the router if you screw it up while getting things running Just Right. But it can be done, and it's worth it to have a no-moving-parts, low-power server that you can tuck in the corner and forget about.

Pros: 6 SATA ports on a Mini ITX MB makes for a modestly-priced Linux fileserver.

Cons: SATA port 2 gave I/O errors. Not sure whether it was the Adata SSD on port 1 causing problems, or the port was bad. (I swapped cables and drives on port 2...no change. But I couldn't move the SSD off port 1, so I couldn't test all the possibilities. Anyway, I only needed 4 bulk-storage ports, so I didn't bother further troubleshooting or RMAing the board.)

Shipped quickly, great price.