Tested this unit against three different thermometers, it is consistently 3-4 degrees F off (lower). If the temp is inaccurate then the relative humidity is inaccurate too. I use it anyway keeping the difference in mind, but I wouldn't buy it again.

I have used the product a few times and have found it is better to apply light coatings and let dry instead of the prescribed two coatings with a one hour wait between the two coating on the box. I did not mix contents all at once and instead split up into four distinct sets and mixed each one right before applying. I also let each coating dry for one day and lightly wet sanded each coating before I applied another coating. It is very important to remove any sanding residue after sanding and make sure surface is very dry before applying another coat. If you apply too much at once coating will bubble and you will need to start over. I also used brand new rollers for each application. Too difficult to work with one and clean each time - your time is worth more as the rollers are not easy to clean. I have found this application works best. Yes, it takes much more time but has served me well over time.

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