We really like the on premise capabilty, running our own server, tied to our own SQL data.
Remember, on premise can be your own AWS instance or the likes.
For small and medium sized MSP's (Managed Service Providers) and Service Organizaitons,
that is between 4 and 40 technicians, Connectwise is a complete system.
If you are smaller, this may not be for you. Stick to the subscription model.
If you are really big, you may like the API's and customization here, but you may already have bigger software.
But, if you are the vast majority of business IT support, then this is the one.
The software is based on the .NET platform, which is starting to show it's age.
The latest version did move to the newest .NET feature set, and works well with 365 now.
It handles quoting and invoicing, time tracking and service billing, project management and management reporting.
Our customers love having a one page invoice, with 18 pages of time detail available behind it.
We use it to drive our incentive based pay model.
We use it to ensure a consistent onboarding experience for new clients.
We use it for the sales and marketing tracks and automated workflows.
We use it to keep things from falling through the cracks, like SSL renewal or UPS battery replacement in 3 years.