Certainly not "another showcase of Valve's world class game design" or anything, you literally just sit and watch real time cutscenes for half an hour interspersed with occasional extremely barebones shooting mechanics that are obviously meant to acclimate you to the Steam Deck controller. For that reason it's not great, but I also don't hate it because it's not trying to really be anything more than that. The humor was also less consistently solid than the prior Portal games (which themselves did not have a perfect track record).

But as a way to kill half an hour? Sure, might as well. Mostly just reminded me that gyro controls rule and should be standard on all games that require you to aim with any amount of precision.