This is the only solution my husband can use that thoroughly cleans his contacts and gets all of the buildup off the lens. Other solutions simply don't work for his eyes. You can buy a large box with two huge bottles and a travel size bottle, plus a new case, at Costco for a great price, and often for $4 off on top of that! This is well worth the extra money to purchase this solution rather than the cheap generic brands. One thing to note is that the solution is very strong -- when you put your contacts in new solution, they need to sit at least 5 or so hours before putting them back in your eye, and you can't pour the solution directly into your eye. Thankfully, the bottle has a warning in nice obvious red to remind you so you don't forget!