The ability to be able to add customers in our own way which helps us keep track over time as well as being flexible when it comes to adding new services that we need help managing! It's difficult at times keeping up but once you get used to how things work then everything flows smoothly again.
I think there could have been more options available within their website though - not all functions are visible from one page like they should really make this easier so people can see what each section does without having to go back many different pages just to find out about something important such as pricing or customer service etc.