If you're having problems with wireless speed or connectivity then it may be due to the house that you live in rather than your equipment. Even modest homes can be too large for a wireless signal to reliably transmit throughout the house, and the thickness of your internal walls can stop wireless signals in their tracks so if you live in a stone cottage or an older house with thicker walls then you may find this prevents you from using a traditional wireless network.
Homeplug works by utilising your mains electricity wiring as the physical connection between your rooms, even sheds and outbuildings providing they are on the same electrical cabling. Homeplugs are available in different speeds and you should make your choice depending on what you'll be using your network for and of course how much you want to spend.
At the lower end of the range, 85mbps products are only really suitable for providing a wired connection from your network switch to your home hub, as the only traffic passing over this link will be internet traffic and wireless network traffic from your storage device to your router. If you're looking to stream video then you should consider a faster device which runs at 200mbps such as those from TP Link and Devolo. Look out for the 'AV' label on these products which denotes this capability.
If you're looking to stream HD (High definition) videos reliably, then you need to be looking at models which have a speed rating of 500mbps such as the Devolo dLAN 500.
