Went thru enough "perfect" Chi-Com cheap humidor, and have learned my lesson.
Humidity instability is always a major struggle.
I dare not to think about buying a "imperfect" humidor.
That is the reason I bought a Aristrocrat humidor. Still "perfect" for almost 10 years (bug infection, but AC went down for a week in the summer, while I was travelling a few years back, PIR my box of Sanchos Sanchos
).