My wife and I got ground level standing room on 12/28/15 and it was worth it. Britney Spears live was the best live show I have seen. I have been to ZED, Taylor Swift, Stevie Wonder and dozens of other live shows. None made me and the wife more happy.
You should definitely check it out, the dancing is awesome, the show is always flashy and Britney is awesome.
It is a great break from the gambling and crowded dance clubs!