I have to say I've been to National many times and never had issues with the service. But when tried booking a reservation for an activity it has to be done online. The issue with the online reservation is that is very deficient they would ask for how many people, date, time and space you are looking to reserve and even if you have any questions and then they will reply to you with a generic answer basically asking all over what you had already provided.
So my 1st email was on Friday requesting for a reservation for 20 next Wednesday, the person (Mariel Jacobo) responded back to me on Monday (basically asking what I had already providing in advance and not answering any of my questions) I responded back on Monday during business hours but had to wait until Tuesday the end of the day for an answer, I responded back but did not receive a response on time for the activity.
So the day of the activity we arrived and we had NO RESERVATION, even through I sent this on Friday. My only question back to her was the time that kids are permitted in the venue! That was my question since day 1 she didn't answer, second time I asked she provided incorrect information as I was not receiving any answers from her I went on Monday and asked myself.
But at the end of the day we had no issues getting a table as the place was not full, but for me was frustrated spending my time making sure to have a reservation and having all info upfront was a waste of time.
The funny thing is that she even had the nerve to respond to my last email... you know when?... they day after the event!!!