The superlite is an excellent brush, all it needs to be perfect is a really good swivel.
I hate working without a swivel and still use the Stanley paint pad conversion daily.
A good swivel has to be right on the stock, and as Jeff said in an ideal world the brush angle needs a
lockable adjuster. An angle adapter just doesn't cut it for me, most of mine have too much side to side play, and I want zero flexibility apart from the swivel itself.
A good swivel gives you the option to use your brush on it's side for narrow panes, and all at a flick of the wrist. Anyone that doesn't like swivels has never used a good one.