Mostly, I've used Bummis SWW, too, with good results, although I do have to be careful about tucking in around the legs. Sizing up the cover can help....
For major-brand covers, the Kissaluvs website has a very helpful
fit matrix. Take a peek.
Other covers I like with my Kissaluvs: Sugarpeas fleece (again, check well around the legs, but it's a beautiful, trim fit!) and a new fave: fleece from
Bluebird Baby, although checking the website, it seems these are side-snapping, and the one I have is hook-and-loop.
Thinking about this, I would recommend side-snapping covers or hook-and-loop closures for the best coverage. I bought a bunch of Bummis snap covers when I started out (found a great sale price and was worried about aplix in the laundry), so that's what I use most, but they take more attention to fabric sneaking out around the legs than either my side-snapping covers or the Bummis with Aplix. I think front-snapping dipes & covers just don't hug around the legs as much.
Covers I haven't tried but have heard great things about (in connection with Kissaluvs) are pull-on pants like the Stacinator So Simple and Polar Babies Happy Pants (which have side-snaps).