I dont use the Little Skeeters, but my father does have a set of 20 gauge Skeeters for his Citori.
As stated above, they are kinda slow to reload, and not real good for fast paced skeet. He uses the handle section from a cleaning rod to knock out the hulls.
One thing he found is that the STS and Nitros come out easier than the Gun Club hulls that are ribbed. Also, certain hulls are a tad longer than other brands. When shot, the crimps will actually blow out over the edge of the Skeeters making them tougher to knock out.
For the price, they are functional... that's about it.
He also has a set of Chamber Mates for his 101 Win. They extract and work much better...but at a higher cost.