PowerLine AV2 1000 technology for up to 1000 Mbps throughput
Simple Connect Button for secure connectivity between other PowerLine devices
Gigabit LAN port & Wall-Plug design for more convenience
Not sure how good they are but seems a reasonable deal.
Usually $99 from MSY, but at it's original price of $99 I instead picked the TP-Link AV1200 Gigabit Passthrough starter kit instead for $109 delivered from Futu_online. Testing them using the TPLink utility, they seem to be talking to each other at 100mbps (when connected in a two-storey home).
But this is a pretty good price for a AV1000 kit, although it lacks pass-thru, its small enough that it won't block adjacent power sockets. Usually for $67 bucks you can only get AV500 ones (eg TL-PA411KIT).