OK, the ease of use would have a five star with no problem for the display if it didn't go back to the original settings every time I want Fahrenheit not Celsius and I continuously have to change it every time I turn it off.
It also does not come with batteries so keep that in mind it takes a 9 V which I don't normally have any laying around because they go and fire alarms and that's about it here.
It received three stars mostly because I'm not sure how accurate it is. I tested out four or five different plants in my house most of which have not been watered yet and then I tried one that is in the direct light and had just been watered yesterday and it still told me it was dry and there wasn't enough light. The other ones are in fact dry and limited lights and I got that correct so keep that in mind, I'm gonna keep judging it and go from there. I will update if I change my opinion on that.
It definitely gives you an idea of where you're at, but I don't think that you can count out at 100%.