I saw a photo of one not long ago in a MH DP. The OP thought someone had stolen his wiring harness off the Cummins. The harness was like GONE. Very expensive repair. Some insurance policies cover it, some don't. Read the policy carefully.
I tried a new one this year 2oldman. Place in Maine on line has several different kinds of urea dirt. I tried the bobcat flavor along with every other device known to man.
Just a note on poison. You won't be happy when the thing dies on top of your holding tank :W