I suppose some people are so unwilling to take the time to learn, or to do something properly, that there's always a ready market for a stupid device to make it "easier". It doesn't work. What do a load of flashing LEDs, (controlled by a smartphone, what else) add beyond what printed chord charts, or guitar tab provide? It's exactly the same information.
Instead, why not spend that $400 on an acoustic guitar (you can get a really good one for that money), and practice putting your fingers on the right strings and frets, forming the chords, practice picking or strumming, and KEEP DOING IT, again and again, every day until you can form the shapes instantly. Your brain will learn, and your fingers will get sore, but that goes away. It takes time, but at the end you've learned a real skill. Imagine how proud you'll feel, you've got that skill for life - the ability to play songs, entertain friends. It's well worth the effort.
Don't piss about with some gadget that promises to let you skip all the hard work. They don't work, never have and never will.