For the price charged these are fantastic value. The only difference between these and others that I have bought previously is that these don't come individually boxed with a little bit of sponge for handling. It's essential you don't touch these with those greasy fingers as that will reduce their lifespan dramatically, so you will need to have your own piece of cloth available for handling them.
For that minor inconvenience I'm willing to forego paying the extra so someone else can wrap them in a factory!
All in all a very impressive offering which I would recommend.