Summary: 8 Months I've been using these and I've not had to reset them ONCE. They've been running constantly without a hitch. I bought a 2nd pack as I wanted a 3rd (couldn't find these on their own). Watching 1080p films from one machine to another across the house without a hitch. Highly recommended.
Summary: Despite claims to the contrary on Zyxel's website, these are not compatible with any earlier models. After following their recommendation to upgrade the firmware on my older 401v1 plugs, I'm now left with 4 plugs - 2 of which had worked fine for 3 years prior to this - that simply will not talk to one another at all. Save yourself some money and buy something reputable.
Summary: This is the second, out of two, complete failures for ZyXEL products out of the box. These units work fine when they are plugged into the same plug socket, next to each other. Across a slightly larger distance but on the same ring, I'm seeing latency of 400ms. Across rings and out into the garden, which is where my old 85mbps adapters worked without a problem, these don't even recognise there's another device there. Steer clear.
Summary: Beware - I upgraded to v3 from v1 because I found it was running hot and didnt always work. having installed the v3 I found - like others - that after a month or so the units start to work intermittently. There is no obvious reason and I have wasted a lot of time trying to diagnose why. ZyXEL PLA-401 V3 200 Mbps Homeplug AV Wall-plugged Adapter - Twin pack I am going to try to get a refund and pay more for a reliable make.
Summary: Not a lot to say other than it does what it says!! I had a bit of an issue at first getting them to connect in the same building but then I moved the network plugs to sockets that I knew was on the same ring and from that point onwards it was easy. Our property has 2 fuse boards and one plug was going to a ring on one the downstairs fuse board and the other plug was on a ring on the upstairs fuse board.
Summary: I got a pair of these a while back and they didnt work. After updating the firmware, they worked, for a bit. I actually have 4 of these - utter garbage, as 3 of them are non-functional (no lights on). They are too fat wide, overpriced and utter rubbish.
Summary: Initially I bought a pack of 2 of these, as I have previously used Zyxel HomePlug units (the earlier 85 Mbps units). For those who worry about these things, these units do not have mains pass through, so you do need to have enough sockets in appropriate places to work with. There are two ways of configuring them (1) with Encryption, and (2) using a management utility - on the supplied CD, or which can be downloaded.