These plugs are of very good quality. Especially for the price. Connection is solid. Plugs and unplugs with just the right amount of force. Soldering is easy. I hope they last, but only time will tell. I use these for connecting my active speakers. All metal housing. 
 
Pros: 
+ sturdy build with nice finish, 
+ easy soldering, 
+ solid connection. 
Cons: 
- none at this price.