Stellar value, especially as the wired version. They aren’t cheap, and so this is very disappointing as it appears that the standards have significantly dropped. Had them for 5 weeks, bottom has started to come off on right toe box. A lot of products with vitamin C are too stimulating for my skin especially since I use Retin-A, but this one really agrees with my skin. I had a slight problem with the chair not sitting 100% level after assembly. This is good because they dont wear out quickly, but be aware they can be slippery on hard wet surfaces. This prevented me from keeping them. It is nice to have that, rather than a button to activate the function. Your fit may vary, but Im not as pleased as I want to be. I have sensitive skin and the strap material is too rough for me.