Haven't used it for bittering, but have used it for aroma/flavor, more towards the aroma end of things. Haven't done a SMaSH, so couldn't pick out Citra specifically, but it blends well with Simcoe, Chinook, Amarillo and Centennial, as far as my experience goes.
Used it in 2 APAs, like so, with great results:
Beer 1:
Simcoe for bittering (FWH, though)
Centennial @30, 20 grams.
Citra @10, 27 grams.
Simcoe @0, 27 grams.
Beer 2:
Nelson Sauvin for bittering (also FWH)
Amarillo @10, 12 grams.
Citra @10, 10 grams.
Chinook @10, 8 grams.
Same again at 0 minutes, with those three hops.
Then dry hopped with those 3, 8 grams each for 19 days (I was in the middle of moving, usually dry hop for 7 days, but this worked out very tasty, not vegetal at all, but then the beer was around 50 F the whole time).
Both beers have a nice, strong, American hop character. Can't pick out Citra, like I said, but there's no weird flavor or anything off. Mixed very well with all of those hops.
Anyway, that's my limited experience thus far. Best of luck with your next Citra use.
Cheers.