This handheld analyzer is a game changer for anyone looking to assess indoor air quality .Industrial and Scientific grade, it delivers humdity and particle measurements with impressive accuracy. Through trial and error, I found that the device was easy to use and its compact size made it great for on-the-go inspections. The pros definitely lie in its performance and versatility but the only downside I noticed is that the user manual could be more detailed. Overall, a great investment for anyone looking to improve air quality..