The thing that I really don't like about Spring Mix is that it does not have a very long fridge life by any means, I am never able to finish a container of it because it doesn't have stable contents. Someone mentioned the spinach aspect (and why I usually allocate spinach to sauteed w/garlic and and go through the leaves prior to doing so. But, that is not what goes slimy first, its that red and green leaf lettuce that goes slimy first and ruins the mix. I actually have started using arugula by itself more, I like the spiciness and it lasts a bit longer than spring mix or to mix with my go to, which is romaine because its got the crispness and can handle some time in the fridge