I've printed a couple sized up 150% and the sound is spine chilling. A neighbor was over visiting with her dog and as I was showing her my builds I gave my whistle a little toot and her 70lb. Golden went nuts. so, anyway, I thought it would be a blast to turn out one at 250%. It looks good, not great, the walls are a little funky but there was almost no stringing. Unfortunately at 250% it's almost impossible to get a good sound out of it. I had hoped for a deep bassy scream but. . . meh. I don't think it scaled correctly and I had the walls a little thicker than the model called for. 7 hours and change to print! Just shy of three inches tall.