I don't know about the larger models but the 1/4" Makita impact driver I bought has been bulletproof.
I am semi-retired from the sigh business and have driven and removed tens of thousands of screws with a few 9.6v cordless drills.
I looked at these when they first came out and they were over $500.00 (need at least two) and never bought them.
Now that I bought them at 1/3 that price I wish I would have bit the bullet.
They are nothing short of incredible.