I posted that comment on the basis that if you pay for something that's not worth it, it's a con. How can anyone justify paying £25 an more for Homeplugs when you can run cat 5e/6 cable for around 10% of the cost and get far better and stable connectivity which is also capable of much faster speeds in the future. All it needs to run cable is a bit of thought about how to route them and a basic ability in DIY. It's not rocket science to run them and terminate them correctly, or even just run ready made cable with the connectors already fitted.
Re: 10% of the cost. Hmm, I don't think so. I grant you that hardwiring IS a superior job but from time to time home plugs are the only practical solution.
So supplying a data service to three locations in the home requires [at retail prices]:
1 - Cat5e UTP PVC Solid Cable [Interior Use] - 100mt Grey £24
4 - RJ45 Cat5e Module in a Single Gang Faceplate - £10.85
4 - 1-Gang Surface Pattress Box 40mm White - £6.72
1 - Clips, raw plugs, screws - £2
1 - Punch down tool - £35
8 - Snagless Booted Cat5e RJ45 Patch Cables 0.5m - £9.05
Total £87.62 + a day DIY installation time
OR
2 - TP-LINK PA411KIT AV500 500 Mbps Powerline Adapter Starter Kit [Twin Pack] - £49
Total £49 + less than 30 minutes DIY installation time.
You might be able to reduce the cost of a hardwired solution a bit but in essence there isn't much difference in the price for either method. Ready terminated Cat5e cable requires a much larger hole through walls which could well be unacceptable from a d�cor point of view.