I'm on vacation and I brought my 5D4, 35 IS, 50L and 17-40L along with the M3 with the 22mm. Wishing I had just brought the 5D4 with the 35. Convinced now I could do a whole vacation with just this lens. It's compact, versatile and the quality is outstanding. I am continually impressed and wishing I hadn't spent all this money on all this L glass! lol Ok, so I'd never let my 50, 85 and 135 go, but this thing is awesome!