We recently rented from National at the Dolphin and I vowed to NEVER do it again.
First, as previous poster indicated, there's just one person to manage the counter. I don't know what other tasks they are responsible for, but in my case, I waited 25 mins until someone showed up at the counter. This was on the Friday following Thanksgiving. You would have thought that at such a busy time, they would have focused on the counter. I was just thankful that I was the 2nd person in line. There were about 4 others after me and I'm sure they were there for quite some time.
From the point where I walked up, filled out all of the paperwork again (their system was down and fortunately for me, I had a copy of my electronic reservation), brought my ticket out to valet, and finally got in the car, it was 75 minutes. They are just slow, slow, slow.
Add to that, was the fact that he car was relatively dirty when we got into it. Was it filthy? No. But the cup holders were sticky and there was an empty water rolling around on the floor.
Bottom line, what should have been a very easy transaction (I'm an Emerald member and had completed everything online) was very frustrating (did I mention that they didn't have the size car that I had reserved??).
I should have never strayed from Hertz and although not as convenient from the Boardwalk, I'll figure out how to work through them next time.