For those of you who don't want to read the entire review, here's the takeaway:
There's lots of entertainment on the Allure of the Seas. However it is all by reservation. And the smart people book their reservations through the website a month or two in advance of their cruise. If you don't do this, yes you can still get in to see the shows. But it will likely mean standing in the "Standby" line for a good 45 minutes or so while you watch all the smarter people troop in ahead of you.
Now for the good things: