Having just caught up with the issues with ESS, 1-3 year contract which does not bother me to be honest, its the not answering the phone, not replying to messages as we are looking for further products to purchase, and the removal of the telephone numbers of their website overnight. YouTube comments turned off, no reply to twitter. That is what is concerning... But their contract portal works 100% and they expect us to hand over 10K but we cant speak to them? Not good ESS and you will push schools to look at other solutions.