ConnectWise Manage

Mobile iPhone app is A W E S O M E !!!
Your clients can use the customer portal
Constant Updates
Feature request bidding system.
24 hour support
online training videos
Application blueprints, telling you which modules interact with other modules.
Handles complicated and compounded agreements. If you can sell it, ConnectWise can do it.
QuickBooks integration is seamless. if you create a product in ConnectWise it will automatically create the product in QuickBooks when it syncs.
Mark invoices as paid in QuickBooks and sync to ConnectWise.
They are the biggest, so they integrate with everybody.
Go to a big IT conference and ask how many people use ConnectWise. The majority can't be wrong.

It can be overwhelming for small companies
The north american cloud can be slow sometimes, they know about it, they are rewriting the program so it operates faster but it's a big project. so they release bits and pieces at a time (weekly)
If it isn't in ConnectWise it didn't happen, yeah it adds a bunch of work to your day. Junk in junk out.
Each user needs their own account.
don't buy the on-premise edition, you won't be able to keep up with the updates.
They update so frequently I have to update my QuoteWerks frequently,

We primarily purchased Manage for its Ticket facility. It now integrates all of our departments, including finance, support, sales and procurement.

Most of the gripes over the years, have been resolved to be honest, though regular updates. In terms of pricing, it's not the cheapest out there. But it does the job well. I guess the support has been better in the past. More often that not now, if you get a problem, it's rarely a quick fix. It has to get escalated etc.

There is a learning curve, mainly due to how much the software can do. That does mean it can be a little complex at times, but at the same time makes it extremely powerful and flexible to fit our needs. We are able to manage tickets across our client base, including project tickets. We can create and edit configurations and attach them to the tickets (example: a server or printer), and then go back and track down ongoing/consistent issues with specific pieces of hardware or software easily. Outlook calendar integration is nice (when it works as expected). We can send out mass email communications to our client base on demand. We utilize this software in so many ways, it can be daunting to a newcomer.

There is a more recent track record of updates breaking crucial things, such as Outlook calendar integration. Our on-prem instance (not cloud) of CW Manage ceased to function some months ago due to an Amazon Web Services outage, which should not have been an issue with an on-prem server instance. Level 1 support can be laughably bad at times. The company seems to be making a serious effort to improve on these things, but they still appear to have a ways to go until they are at that point of having a consistent and stable product (especially when updates are involved).