Since this aquarium opened I had always been a fan. It seemed a bit short the first time I went and I will admit I thought it was a bit pricey. But the (Greater?) Cleveland Aquarium is not subsidized and so its understandable why its not as cheap as the zoo. That said, it seems to get better every time. The walk-through tube is definitely the best part and the stingray tank is a close second. The little shows they do throughout the day are pretty cool too.
I am more a fan of the RTA than driving but I did drive here one time and parking was only $3 which is considerably lower than other lots in Downtown Cleveland. I do hope that the GCA will someday participate in the reciprocal admission with zoos around the country.