I absolutely LOVE 'em! They are expensive and small, though. They are a good size for the first few months, and have loads of calcium and a great ratio to Phosphorous (1.5:1). They turn to flies pretty quickly if warm and can't take the low temps of a typical 'fridge, so don't buy more than you can feed off in a week or so. I had a dedicated dorm fridge set on 45f at one point to keep them.