I thought Ken did great. He didn't stumble, was very good at reading the clues, interacting with the contestants and explaining wrong answers. The only weird part for me was when Ken was off camera reading the clues, it wasn't Alex's voice and that made it different. Ken has a good speaking voice & enunciates himself well. Interactive poll at the link to grade Ken's debut episode.
TV Line:
GOAT Jeopardy! contestant Ken Jennings took the guest-hosting reins in Monday’s episode of the iconic game show, filling the gargantuan void left by the late Alex Trebek. At the top of the broadcast, Jennings addressed the elephant in the room, assuring fans that he is fully aware that Trebek is irreplaceable.
“Sharing this stage with Alex Trebek was one of the greatest honors of my life,” Jennings said. “Not many things in life are perfect, but Alex did this job pretty much perfectly for more than 36 years, and it was even better up close. We were dazzled by his intelligence, charm and grace.
“Like all Jeopardy! fans, I miss Alex very much,” he continued, fighting back tears. “And I thank him for everything he did for all of us. Let’s be totally clear: No one will ever replace the great Alex Trebek. But we can honor him by playing the game he loved.” (Watch video of Jennings’ message to viewers above.)