I've seen the Fab Four twice. I'm a huge Beatle fan. If you are a fan, they are worth watching. I hear they will be a free show at the Paso Robles, CA fair this summer.
They wear the wigs, the make up, the clothes/costumes to look like the originals. But the coolest thing is that they use the same instruments & amps. And, they sound Great!. All live so far as I can tell.
The McCartney double was even left handed, while the drummer had a truly big schnoz ala Ringo Starr lol.
To me, the trick is to NOT sit up close. Sit back far enough to enjoy the sound mix, but not really make out the faces. The fact that they sound, look, and act so much like the real thing, it does get kinda weird when actually looking at their faces. But if you sit back, and take in the sound & scene as a whole....., it almost feels like you might imagine it was in 1965.
Go see them. You won't regret it.