I've been happy with my Transducer Shield and Saver, although I've only had it a few months. If looks matter to you, the powder coated clamps for it that come from the same company look really sharp, too.
Just be sure that you match up the model number on your transducer to the model that the shield & saver fits. Despite what some boat shops will tell you, (cough, cough Ken-at-Boerne-Marine, cough, cough) all of the Humminbird SI/DI transducers aren't the same size. The sheild & savers have model numbers for a reason.