I thought I would get on here and state my opinion. I have had my milk kefir AND water kefir grains from Mr. and Mrs. Kefir for two whole years now. I am extremely happy with these super healthy grains. I have been sharing my grains with family and friends as they have been so abundant. For a while I was extremely slacking in effort to keep up woth my grains, I would have them in the fridge for MONTHS without feeding them. I have noticed that just like with my sourdough starter, the more I tend to it and make recipes from the products, the better and stronger and tastier my cultures become. I make yogurt, cream cheese, soft cheese, sourcream, smoothies, whipped cream and I bake enriched sourdough recipes with my milk kefir. I trust this company very well. I hate to see bad reviews. Anything could have happened to those who had the negative experiences. Starter cultures need clean environments to live and grow in. They require some form of care. Carelessness or lack of following correct instructions will of course lead to a terrible experience. If I can keep my grains in the fridge for months and they remain vibrant and healthy with this brand's products, I just had to get on here to share my experience.