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I recently updated my 2011 MBP to SSD, so naturally, I wanted to take advantage of that speed when using Lightroom (and anything else on my network and web). Since I mainly use my laptop on the chair picture above or on the couch, I figured I could put a power line ethernet adapter in both areas and be able to make better use of my time when using a laptop.
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Once I plugged it in, I attached an ethernet cable and plugged it into my MBP (the ZyXel has a couple ethernet cables, but they are short). I was immediately connected to the net and the speed seemed to be just fast as plugging directly into my router.
While I realize that a lot of people move around their homes with their laptop, which is similar to how I use an iPad, so tying down to an ethernet cable may be too cumbersome. However, for me, I usually keep my power plugged in all the time, so this is just another cable that completely improves my experience. I would highly recommend the adapters for someone in a similar situation.