After watching the first episode, I found Jane Lynch to be a surprisingly good host. She interacts with the contestants with humor and keeps the celebrity egos in check so they are not talking over each other too much.
The six celebrity competitors were great. I hope they can continue to get panels this talented. The first show included Matthew Perry, Kristen Bell, Martin Short and Lisa Kudrow, for example. They looked like they were having a great time. With people this funny, it is the humor--not the actual competition--that is the best aspect of the show.
The scoring is weighted toward the end of the show, keeping the gameplay relevant. This is a game convention (see Jeopardy! or Family Feud).
They use various games, rather than just one type of game, keeping it interesting.
I have one criticism: when the game involves a visual puzzle, I like to play along with the contestants. It is annoying when they cut away from the puzzle after a brief shot, not giving me time to solve it. Wheel of Fortune does the same thing.
I will watch this show again.