Ordered a 10-pack set of these connections with a little apprehension because they were significantly less expensive than others I've seen.
I was pleasantly surprised to find that they are very high quality! They strip easily, the insulation doesn't melt during normal soldering, and the connection is snug and secure. Excellent!
Pros/cons: I wish they were available in longer lengths - I'd rather have more to work with and cut them short as needed.