I have 4 Domkes and washed them all
I have an F-3X, F-2, F-8 and F-808. I put them in the wash as soon as I get them. I like the used look it gives them and it helps to soften them up. My F-3X was washed about 15 times before I used it.
A word of caution, though. Do NOT put them in the dryer and a large washer on gentle cycle (cold water) is better than using an HE washer. The zippers broke on my F-808 when I put it through the HE.
Other than that my bags came through fine. But that's me. YMMV.