Be aware of additional costs for functionality. For example, the interface module for loading data via CSV is an additional cost, as is the pensions module and online time sheets functionality amongst others.

I'd advise being very clear about what you want the system to do and what that will involve in terms of licensing. The systems is adaptable but can require additional licences for that.

I would recommend ResourceLink and it is a highly customisable solution to any organisation, but they would need to employ a System Analyst to fully implement the system due to the size and complexities.

Get your procurement template correct. Be realistic about costs as HR/payroll systems are not always as cheap as you think they are. Be very vigilant in your PID or FNFR documentation to ensure the supplier is aware of all of your requirements, including any complex reports. Make sure you cover costs for training. Spend time planning before just rushing out to buy this product. Get NGA to give you a realistic demo rather than the glossy sales pitch, and finally, make sure you have a consistent PM. We went through 4 PMs in the end and there was no joining up so you find yourself repeating everything, and nothing gets resolved quickly. Ensure you have regular contact and meetings between your company and NGA.