Depends on what you are trying to do and size of your accounting need.  You can use Bill.com to do all the payables and receivables and run everything through Excel.  OR if your needs are larger I use and or have used these in the past:  

Sage Intacct - from the old PeachTree accounting

NetSuite - if your client is large enough.  Offers a partnership program for accounting firms.

CS Accounting by Thomson & Reuters.  Cost of the license but like the old QuickBooks desktop you can run multiple clients and there cloud system is better than the old QuickBooks Desktop file sharing.

QuickBooks is not the only game in town and the only thing Intuit will hear is the cash going out the door.  They are ignoring their customers, what exactly is better about the new report views or invoices?  The new report view is a horrible and costs me more time not less. 

It's like they are a social media company trying to keep our attention with the constant changes to the User Interface.  I don't need to relearn how to use your program and I'm spending too much time in your software as it is!!!