I have the new 1588. It does really well with the temp for me as set by the company. But I did have a bit of problem with the humidity being enough during lockdown. I use a mist bottle and a sponge to help out and it works fine. Also when I add water I use heated water to keep the temp level up. I LOVE MINE. I would like to by another for a hatcher later in order to stagger my hatches some.