I just kegged it a few hours ago so it's too soon to tell. It's an APA, about 45 IBU, and except for 1/2 oz at 60 the hop additions were all late (1/4 oz at 20, 1/4 at flameout and a 3/8 whirlpool addition at +30).
6 lbs Golden Promise and 2.5 oz acidulated (my well water is high Ph), mashed for 60 min @ 152°.
This was a 5 gal recipe I put together in BeerSmith and then scaled it back to 4 gal on brewday because I only had a 5 gallon fermenter available.
BeerSmith predicted 1.041 OG and 1.009 FG; I hit 1.042 and 1.010. Just over 4 gal in the keg. The uncarbonated beer is pretty dry and a bit thin; carbonation will change that, so it's wait and see. The flavor and aroma of the Mosaic is quite pleasant, though.
I had a Mosaic SMaSH at a brewery in western MT last summer that I really liked. I finally got around to brewing one. At this point I don't know what I’d change. Time will tell.