The bus stops and buses seemed to get super crowded at certain hours so you might be waiting for a while, but I was extremely thankful when this random elderly couple gave us their 24-hour passes when they were done with them (with another 3-5 hours of time left on the passes). My mom and I ended up taking the bus back to our hotel after walking for about an hour in the sun.
Note to others: If you're done with your passes and there's still time left on them, pass them on! I'm betting that there will be someone out there who'd appreciate them.
Apparently we also lucked out because it only took us about 10 minutes to get back to our starting point (instead of 1-2 hours)?
I hadn't really looked into it before going, but I was very thankful for the one time I got to ride The Deuce.
Love the name, by the way. ;)