Always interesting when it comes to any kind of media that is used. I've read for years about beads, KL, gels, et al and every type of media has its fan club. 20 humidors that range from 25 all the way to 500 ( wood and tupperador ) and all of them with KL convince me of what I use. I've used everything else and KL is easy and inexpensive and calibrates to a RH that I want within a day. I like 65% and as long as tupperware is in a good environment in your home it will function as well as anything out there. Putting it in an environment that is detrimental to the contents just doesn't seem to be the smart course....cold, hot, too much sun, etc. will have an effect for sure so common sense should prevail and keeping it out of direct sunlight...in an environment that is between 60 and 75 degrees will be successful. For those who don't like the media or think it's too hard to adjust then by all means use another media.