For cloning, I use mortar trays from Lowes to hold the water. I warm the water with an fish tank heater and aerate with a fish tank bubbler. I use solo cups with holes in the bottom and sterile potting soil. Works great. Costs next to nothing.
Have seen commercial plug and play packages but never goofed with one. Wondering if anyone has any practical experience with the prefab units. If so, what are they other than a way to keep the water warm and airated?