It worked great, did exactly what it is supposed to do which is move a lot of water quickly. Tried it out in real life conditions with sand, gravel, and other debris in the hull. Removed a few inches of water and left maybe a cup or two behind. I would buy this again and recommend it if you're looking for a decent pump. I paid $19.95.
I have read about some pumps becoming jammed when used in salt water with sand in it. I got to test mine in such conditions in a real life situation. I got dumped out while surfing for the first time( it can happen to anyone). After righting my kayak and a cowboy scramble back in the cockpit, I got to the task of pumping out the water. Being the coast of South Carolina, there was a fair amount of sediment and sand in the water. The Seattle Sports pump worked like a champ. It moved the water fast enough to empty the cockpit before the next wave hit.
See my YouTube video of this including the pump in action at https://youtu.be/bk8gkgEEsz8