I've used CorrectToes for years and they work very well for me, but they aren't perfect. This kit really addresses those issues.
1. They are significantly cheaper but not lower quality (a unicorn in today's world)
2. They are a much softer silicone so I can wear them barefoot instead of having to wear with toe socks. The thicker posts between the toes of the level 2 spacers also really help them stay on my toes more securely without socks.
3. I have a pretty large gap between my big and 2nd toe, so the level 2 spacer is so nice . I can make my CorrectToes fit that space, but getting something in the spacer hole that's large enough, without ripping it, is tough because of the stiffer silicone. With these I can widen my big toe even further out if I need to.
Having both levels of spacers is great in case I need to wear shoes that aren't as wide.
I can't speak to their durability, but they seem like they will be harder to tear then my CorrectToes. The steep slope of my toes always leads to a tear in the middle of my CorrectToes, again because of the stiffer silicone. These are able to follow that slope much better because they are so flexible.
Really an excellent product and the first one I've tried that I would recommend over CorrectToes.