ADP has great customer service on top of their popular platform.
ADP needs no introduction as one of the largest vendors in the HR space. They of course manage payroll for millions of employees each month. They also have a software suite for HR teams who need a simple talent management suite.
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ADP offers in-depth implementation guides on their resources page. While this document is for payroll, the process is similar across all solutions.
ADP has separate packages based on on whether or not you have over or under 50 employees. They do not offer pricing information on their website, but they do show that talent management tools come with the Performance Plus plan.