I have owned these for a year now, and I've used them on and off as needed.
They're for smaller heads! I thought I was a pretty small-headed person (for reference I'm a 5'5 woman, I consider myself decently petite), and these ends dig into my skull.
The foamy material is also quite irritating on the skin. I don't have any kind of skin sensitivities, so trust me, this will happen to you, too.
The lens itself also isn't obviously made of the kind of material you get from real glasses, so the visual acuity loss is pretty irritating considering I'm used to the crisp experience.
However, using these $25 glasses has allowed me to evaluate my needs and how helpful these are. I'm planning to upgrade to the Ziena's now. I wouldn't have ever made the $200 commitment without these $25 pairs to convince me that moisture chamber goggles are more effective for me than hourly eye drops.
I highly recommend getting these if you're small headed (or even medium head sized, you can't wear them all day, but you can for a few hours) and skeptical if moisture chamber goggles will make a difference for your comfort.
As always, I would like to thank the dry eye shop for exposing me to ideas I've never heard of for relieving symptoms. I've learned so much by being a member of this website, email newsletter, and by corollary, the community.