I have used WHMCS since version 3.0 was launched (at least 10yrs ago), I've used many themes over the years and Lagom has to be my favourite theme and the Lagon support team have been fantastic at responding to questions I have about the theme.
I highly recommend Lagom to anyone who is looking for a modern theme that looks great and gives a nice user experience during signup process.
EasyDCIM is amazing, anyone wanting to sell dedicated servers should use EasyDCIM its a control panel for managing everything in your data centre including power (APC/Raritan etc) switches, bandwidth management!
you link it up using the WHMCS module so your clients can manage their server from within WHMCS including reboot/shutdown/switch on.
The WHMCS module also shows bandwidth usage and compatible with WHMCS bandwidth billing overusage so you can bill customers for bandwidth over usage at the end of the month.
10/10 for EasyDCIM & the Module!