First things first: a Quick Look is meant to show off a game to people, with the intent to educate them on whether or not they want to buy the game or not. That assumes that the game is played competently. And herein lies the problem. Lately there's been a significant decrease in QL quality in terms of informative gameplay and accurate discussion of the game at hand. I believe I speak for most of the GB community when I say, please do your research - at the very least, play through the section you plan on showing off.
PS For an example of how QL's should be made, watch some of the Kessler-directed QLs. Love him or hate him, he definitely did the games he showed off justice. Despite the fact that one was a mediocre JRPG and the other was a complex map-making dungeon crawler, he clearly did his research and understood the underlying mechanics before showing them.