It is very easy to use, it has good documentation which makes you feel comfortable using this software from day one. The user interface looks simple but there are so many features that can be used in real life situations like monitoring of plants or machinery etc., I am not able to find anything negative about c21 monitor apart form its price tag (which might look expensive for some people). We have been solving problems related with our manufacturing process by calculating different parameters through an accurate data logging system called "c21 Monitor". This helped us improve quality standards at work place as well as making sure we were meeting customer expectations regarding product delivery timeframes.