The only flaws: the probe a little short cable (but hey it's ds description) and instructions in Chinese only (found in English in pdf on the net).
Otherwise although this version is cheaper, I think given the price difference STC-1000 is more bang for the two relays (automatic switching between the heating and the cooling function) and longer cable (2m I think). But that of course depends on the use we intend to make.
In short, overall very satisfied with my purchase.
