good
Bit pricey for what you get, but the 9g pack makes 500ml of gel easily, and can be stored in the fridge until use. My Blaptica Dubia feeder roaches love it. If you keep it in a warm setup, make sure to mist the remaining gel once in a while, as it will begin to lose water content.
This product works well at preventing the feeder insects from drowning, however it is very easily fouled. If the crickets frequently deposit their waste in the water source the smell is unbearable - even when only using a few granules. With this in mind the water source will have to be changed several times a week and for the money this item costs it would not be viable.
If the room temperature gets too hot the crystals dissolve and the crickets drown in the water.