Don, I got a 2.0 Shield (40) two weeks ago. I've put about 300 rds through it. To field strip I remove the mag & check chamber, lock the slide back, rotate the takedown lever down (clockwise), release slide lock and pull the trigger. The slide will move forward enough to pull it off.

I don't use the "deactivation" lever - it is just a pain. If you do activate it inserting a magazine will deactivate it.

To reassemble, I just put the slide on and lock it back then rotate the level (counterclockwise) back up and release the slide lock.

The takedown lever was a little stiff - not too bad.

Hope this helps. Good luck!