Well....this OP figured out I need to get everything ready to go flying where I still have a WiFi connection then the chart works. And the layers are actually not much different than scrolling through the 396 (which, by the way Jay, has taken me across the country from Pensacola to Long Island to Seattle to Oshkosh several times and home to California several times etc. etc. with no problems) to see different information. Just thought it would be nice to see TFRs and wind and a couple other things on the same screen....but I guess that's asking too much of Garmin.
Anyway, love my little Nexus but the screen is WAY too dark for a canopy so those who are thinking of this setup in a canopy are not going to be as happy as the salesmen on this forum. It is dark and hard to see with sunglasses even like mine which are CLEAR on the bottoms to see better. On my poor little 396 I get bright vision, airspace warnings, Vnav directions and absolutely NO issues with wifi, preflighting the unit, checkerboard views etc.
I'm guessing Garmin does this intentionally to keep folks like me stuck on my little 396. Fortunately I can see the stamp sized screen just fine, it has taken me all over the country just fine and since I can't hardly see the Nexus in my cockpit I'll just have to keep flying coast to coast with the 396 and all it's terrible drawbacks......
The nexus has become nothing more than a downstairs internet browser where I don't have my main computer.