The Good: The Extollo LANSocket 1500 Powerline Adapter Kit has best power-line performance to date. The pass-through feature is an space-efficient solution that allows other devices to plug into the kit. It's also affordable and ready to work right out of the box. The Bad: The adapters are bulky and might take up too much space around the wall socket it occupies. The Bottom Line: The Extollo delivers everything you'd want in a power-line adapter, and its pass-through feature makes the somewhat awkward beefy body easily forgivable. The Extollo LANSocket 1500 Powerline Adapter kit has everything one would look for in power-line networking. It delivers top performance, requires no networking know-how to use, and at the current cost of just $90 (with two adapters included), is among the least expensive Powerline AV2 adapter kits. What's more, the adapters feature a pass-through electrical outlet, allowing you to plug other devices into it. This frees up any outlet it's actually plugged into.In all, other than the bulky size and the fact that it doesn't deliver close to the top speed of the Powerline AV2 standard (a drawback shared by all other current power-line adapters), there's not much else to complain about.For those in the market for an effective way to extend their wired network without having to run a bunch of network cables around the house, the LANSocket 1500 is an easy recommendation. If you don't need a pass-through socket and want something a bit more compact, the \tNetgear Powerline 1200 kit is also a great choice. Or you can check out this list of top power-line adapters for one that fits your budget and needs more closely.Practical designThe Extollo LANSocket 1500 kit is both similar to and different from the rest of high-end power-line adapters I reviewed in the past few months.Similar because the kit includes two identical adapters, each using the popular three-prong snap-in design, looking just like a regular power adapter. The adapters themselves are bulky, measuring 2.5 by 1.5 by 4.5 inches. By comparison, the LAN Socket adapter is a tad longer and thicker than the D-Link DHP-700AV adapter but also noticeably narrower. It's definitely larger than than the Netgear Powerline 1200. This means you will have slightly easier time finding a wall socket to plug it into than with the D-Link, yet a bit harder to work with than the Netgear. Generally, with an adapter of this size, you can't help feeling concerned about the amount of space it takes up at the power outlet panel.What makes the LANSocket different from the rest, however, is even when it obstructs a surrounding socket, it doesn't stop you from plugging in another device, thanks to a built-in pass-though electrical outlet on its face. And since power-line adapters need to be plugged directly into the wall to work well, this extra outlet means the LANSocket can be useful even at the place where there's only one wall outlet. You then can plug another device in on top of it, or even use a power-strip and share that single wall socket with multiple other devices. Generally, power-line adapters need to be plugged directly into the wall to work well.It's also worth noting that while the LANSocket adapter is big, it's actually still quite compact for one that features a pass-through socket. The\tNetgear Powerline AV+ 500, which came out four years ago and shares a similar design, for example, is almost double this size.Easy setupThe Extollo LANSocket 1500 kit includes two adapters and two short network cables. Generally, you need two to create the first power-line connection. There's a well-illustrated setup poster on how to do this, but chances are you won't need it. The process is dead simple. First, you hook up one of the adapters to your existing router, then connect a second adapter to almost any device that has a network port, such as a desktop computer, a printer, a game console or even a Wi-Fi access point. After that, plug each adapter into a 110v wall socket and you're done. The adapters turn the electrical wiring in between them into a network cable and extend the computer network from one to the other. Note that power-line adapters tend to work the better the shorter the length of the electrical wiring in between them. The maximum supported length is 985 feet.After the first connection is established, you'll need need just one more adapter for each additional device that you want to add to your power-line network. For the most part, the rule of power-line networking is you buy the number of adapters equal to the number of wired clients you want to connect, plus one. The Extollo LANSocket 1500 allows for adding up to 16 devices to an existing network. Currently you can only purchase it as a kit of two, but this kit will also works with power-line adapters form other vendors as long as you don't turn on the security feature.