I can’t say anything for their generation2 devices, but the early stuff was ok.
You won’t need an intermediate. Just use a battery powered remote switch and pair it to the main one.
Actually, doesn’t need a 2 way either. Just one main and any number of paired remotes.
Also they don’t need a neutral, so good for retrofitting in an older house.
If you want it controlled vie phone app, or Alexa you’ll need the Lightwaverf hub plugged into the router.
Hit and miss with dimmable LED’s... but they are partnered with Megaman so they should work.