Impressions of Zenefits payroll?

I have a startup client using Zenefits for benefits and Xero for payroll. We need to switch the payroll for a few reasons and thought that combining benefits and payroll is the way to go. I haven't heard much about Zenefits payroll, and their HR and benefits have been fine so far. Anyone have any impressions of Zenefits payroll? Several people have recommended Gusto payroll, but we're trying not to move everyone off of the benefits platform if Zenefits is a solid payroll service. Thanks