I made the switch 3 years ago to this one from Renu that I had been using for 10+ years, I didn't see any difference, it does the same job and it's more economical.

So-so for hydration, cleans contact lenses well and is suitable for sensitive eyes, but it does not hydrate well. My eyes constantly feel dry.

I have been using optifree express for 15 years. I have tried almost everything because I wanted to replace it due to dryness. In the end, this is the best, I wouldn't change it for anything.

It creates a blur sometimes. It is very good for hydration, even after many hours it doesn't bother you. The closing of the container, which is screw-on, is inconvenient. I would prefer a clip so that it doesn't touch surfaces. Sometimes there seems to be a "soapy" appearance in the liquid due to the transparent container. I bought it because of good reviews, but I am returning to my old one.

I believe it is the best product available. I can wear contact lenses for 17 hours without my eyes drying out. I can even sleep for 3 hours without them drying out.