I have one that I use a thunder shirt on, and it helps some.
Not a total fix. If we expect rain I put it on her early,and spray some lavender near her crate. When the storms start I lay a blanket over her crate. Doing all three seems to cut her stress in half, but have not found a total fix.
I've tried the DAP collars in the past, and they did give slight relief. I just use lavender if I've forgotten to order the dap collar.
Shopping with your husband is like hunting with the game warden.
Experience is what you get, when you didn't get what you wanted.