Pretty happy with it. If I am being picky it is not as good in terms of quality as my other 2 Lowepro bags but they cost more, quality its fine, just next to the others (like the inserts) its a bit thinner. Will easily take a XT3, 16-55 and have space for a flash and 2-3 other lenses, plus a separate area at the top which could fit a x100.
In that case then I reckon it would fit, can always return it for free on Amazon. I was really impressed with the quality it was just a bit too tight for my needs as I also have the battery grip on the XT-3. They usually have them on display at John Lewis if you want to take your lens in to try it, but the price is a bit steep.