I'm starting my fifth year with my 6v Optima. No issues. It was a bit of a challenge to mount in my under floor battery box because of the narrowness of the battery. My battery "box" is a metal strip about 3" wide that allowed the Optima to fall out one side or the other. I fixed the problem by attaching two pieces of 2x6 to the sides of the battery.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.