I love Quick Adsense. It's very easy to use and comes with some nice features.
My only suggestion would be the option to exclude one of the ads from the 'random ads' rotation. The option to display random ads in a location is great but only if all of your ads are in the right format to display in that area. For example, if you have 3 or 4 different square 'in-post' ads but then one wide banner, you'll mess up the display of your site whenever the wide version is selected.
Maybe an option to set two different groups of ads? So you could add all your square in-post or sidebar banners to one and all your wide banners to another and then you can choose which group to select from when choosing the random option.