I like that it is able to monitor our building's energy use, as well as provide us with reports of how much we are spending compared against what was predicted by their software suite! It can be difficult for users who aren't familiarized w/ this type of system (and there should always be more training). We have been using OE since 2012-2013 when they first came out in San Jose - now located here at UCSF Stem Cell Research Center in SF Bay Area. Our team uses the product daily so any issues or problems arise quickly & efficiently solved via support staff.