The ease of use for both new users as well as experienced managers, it's really flexible which makes managing buildings easier than ever before! It is also very robust with lots more features that can be added to enhance your solution even further so you are never short in power or abilities when solving issues within an organisation!! We have recently started using OEPT (Openerity) but we do not currently manage any sites outside our own offices - however this does make us feel like less-informed about other projects/industries out there who may benefit from their product? So far no real complaints at all regarding performance though I know others will say otherwise depending upon how they set up data sources etc., maybe try some different setups first if unsure?! If considering building management then definitely go through reviews online & compare what works best / most suitable solutions available today. Have used Openetivity since 2014 during my time working @ Balfour Beatty where i was part.