I have a cool job that lets me travel around to different conventions, and I've been seeing these Nat20 Sabers folks at pretty much all of them. I finally decided to check them out, and it's actually pretty sweet!
At their booth, they have a "forge" set up with different pieces so you can make your own custom hilt, then they put the electronics and all inside. The blade is extremely durable and can take a beating. They had a sign reading "free lightsaber battles" so people could mess around and try them out, and they encouraged them to hit them pretty hard.
It has (I think) 9 different sound fonts, motion controls, color change, accelerometer so it reacts when you move it even just a bit which is actually very nice, clashing effects, blaster deflecting effects, a drag effect for some theatrical moments (like you're dragging it along the wall or floor), and saber locking effects.
Overall it honestly just feels really nice, and it's decently lightweight as well so you can really swing it.