I have an Optima Red top in my camaro... I started the car up for the first time in probably 6 months last night... and it fired right up... every year I've owned the car before this, starting it up after the winter the battery was always dead and wouldn't take a new charge.... from what I saw last night with that Optima, it's worth it's weight in gold... with that being said, I've also heard, if they go dead, it's hard to ever get them to recover. although it's proving hard to get them to die seeing how our winter sucked wanker and it was good to go when I started it last night... no trickle charge or anything... hell, I didn't even unhook the battery for the winter.