I like it post-spawn with a creature bait or a craw. Cast to the back corner of a dock and drag it parallel to the stalls, you can also flip it around dock stalls like you would a jig. Fish it shallow off gravel points early in the AM, then deep later in the day. You can fish a lot of plastic on it, worms, flukes, and paddle tail swimbaits.
My biggest beef with off the shelf swing heads are the hooks, usually they are not the greatest and they are molded in so you have to cut them off if you want to change out the hook. You'll also have to add a split ring or two to get the hook to ride upright.
I just looked at Swing Oil's site and see that they sell heads with a split ring. So you can put your own hook on them. Nice option as you can get finessy with them, and for example fish a Finesse worm on a 1/4 oz head.