Used Saltwater Fishing Tackle

I am looking to buy either the Little Green Machine Pet (its the one that heats up) or the one made by Dirl Devil. I've heard the Little Green Machine works pretty good, but have no idea about the dirt devil. They are priced about the same, but the dirt devil has a two-year warranty vs. only one year for the little green machine. Can anyone give suggests on the dirt devil? I've decided against the Spot Bot Pet b/c the price is much higher than the previous two. thanks.