Don't run an entire spread, but have 2 dozen Mallard Deadly Decoys and they look great and are easy to set up, light and effective. The heads are super looking, good paint and the sock part has held up well and looks super in the wind. Lots of movement.
I have a combo, G&H shells, GHG full bodies, homemade floater to fields and Deadly's. All mallards with a few flat bottomed, suck, Flambeau pintails. They all are very effective. I also run 2 mojos and sometimes run a homemade vortex. All field hunting in Saskatchewan.