I haven't tried it, but I do want to give it a shot. I've followed its evolution; it's an engine that has gradually been evolving in 3D, which is ultimately what interests me the most. Obviously, you can't expect Unreal Engine-level results, but then again, that's not what I'm looking for either. My dream game would have a stylized design, and right now Defold seems to be achieving some interesting results in 3D games. I think it would be the perfect time to take a look, because it's an engine known for being very well optimized, and it's always good to know about alternatives.