@RangerZ To add to your list (and provide some personal experience), Comtrend has a newer g.hn Wave 2 powerline+wifi option. There's also another option that would complement using a separate wifi router.
PG-9182AC - Standard style powerline adapter with a built-in AC access point.
PG-9182DC - A replacement wall-wart adapter for a router, but includes the g.hn endpoint built-in to it (so you'd use this to power a separate router, but also plug this adapter into one of the router's switch ports for the g.hn connectivity).
I've been using the PG-9182AC for about two years. I have two of them; one is in a far bedroom to amplify wifi over that half of the house, the other is in a detached garage about 50 feet away from the main house that provides wifi signal to my whole back yard. The adapters are pretty straightforward to use. The g.hn configuration and the wifi configuration are handled on different IP's so each device has two separate logins. The g.hn config has very little to tweak, and I can't find any good documentation on what any of the more advanced options do so I just leave them be. The wifi config lets you modify the settings for the 2.4 and 5.0 Ghz bands, adjust power levels, WPS, scheduling, and you can add additional SSIDs if you want for e.g. guest networks. You can also see associated clients and what rate they connected at. From a wifi-config view, it's super basic and doesn't really offer many advanced config options (even a cheap wifi router would offer more options, if you're inclined to tweak the config).
The wifi portion is about as reliable as a cheap router with default firmware; by that I mean I have to reboot the devices once every 1.5-2 weeks because they start bugging out from long operation. You can reset them from either the g.hn or wifi web interface so its not a big issue. Note, this only limited to the wifi portion; the g.hn powerline connection between the adapters is rock solid, and never needs to be reset. My only real gripe with the product them is they lack any sort of AP steering/handoff support (802.11k/r/v); I have a Zyxel AP as the main wifi AP in the house, and the hand-off between them can be annoying. I've tweaked the power levels of both the Comtrend and Zyxel so there isn't a lot of overlap of coverage in the house, but my wife's iPhone takes a long time to switch between them; this has been the only persistent problem.
In regards to g.hn vs HomePlug AV2, in my home the g.hn is the more reliable of the two. I previously had all HomePlug AV2000 class adapters (none with wifi, just the plain wall adapters connected to some other device). In order to use the Comtrend I had to upgrade all of my adapters to work on g.hn. Performance-wise both protocols were comparable in each location I had them; however the g.hn seems to handle line noise
much better, and the speeds between different adapters are more consistent over longer operation (at least they were when I was benchmarking them after making the switch 2 years ago.
I previously had two cameras connected with their PG-9182POE device which integrates a POE+ switch with the g.hn, and those also worked very well. I've since added network drops with a POE switch to replace those, but they're handy to have as spares.
I don't have any experience with the PG-9182DC, but I always thought that was a clever idea vs using a traditional plug-in style powerline. The config for it is likely just the basic g.hn config on the all the other adapters.
I've been personally intrigued with the devolo Magic 2 Wifi you linked, because they advertise AP steering support. But I've also been undergoing an effort to actually run cable, so my powerline network has been slowly dwindling as I add drops in places where I'm using them. The end-game for me is for the only powerline to be in my detached garage.
