The ability of being able to track plant health in real time throughout my whole greenhouse, it's easy to use and I like that you can set reminders if there is any issue with your plants or not enough light etc. Nothing really! It has been very helpful so far but everything will need some getting used too. If you are looking into this product make sure you do research first as they have many different versions out now and you want one that suits what you're doing best. Tracking all our crop needs at once throughout the year helps us keep up with demand without having issues later down the line when we don't stock correctly.