They are fast responding in most of our needs regarding their services we paid for. I like how they work with us during implementation process so that there is no problem at end-user side after release deployment. We had some problems about performance while using our software (Dynamics 365) but it was solved right away without wasting too much time or money. Nothing really bad! It's hard choosing only 2 points here because this service has very high rating among customers who used them before me as well as now they also recommend other companies to use also. So overall great choice if one wants to be reliable partner. The main reason why my organization chose copperegg over others is price point since i am paying monthly subscription fee instead of annual cost which can go up to 30000 dollars per year when paying annually.