I've seen them in Everett several times, huge haul of pots. I don't know how they recover them, but they guy said he could go out every day all year and never run out of pots to recover.
I know a guy who lost one today, please be careful where you set, not on top of someone else, and if you use those flimsy pvc poles make sure you have a secondary float of some sort so when it breaks you don't loose the whole thing. It happened to me about 20 years ago and I learned my lesson with those things.
You can re-rig them so if they break you don't loose it, they come rigged with a loop at the top and that will just slip over the pvc and then bye-bye, it needs to go through a hole in the pvc or better yet have a secondary buoy attached.