Iam using lenses from past 7 years, and from starting I prefer to was my lenses by renu solution only, I keep my lenses in this solution and I never faced any kind of issues, durability of this solution is 6-8 month so if you are not a regular user than please dont purchase a big pack,
you can use a smaller or mid size of pack, its easy to use, you can wash your lenses before wearing in your eyes and still u will not feel tired, this solution is price worth product because you will get it in very low price, small packet and extra free ml.so if you are planning to wear lenses than go for this solution it will keep ur lense safe.