Hexa is a great template. The second I have bought from CMSBased. First was BlueHost. I also bought another dev company's template about 4 years back and it was no where the quality of Hexa.
I have been using Hexa for about 3 years now. The template gets quick updates after new verisons of WHMCS, basically the same day or the next. It also gets various other fixes and feature additions throughout the year.
The template is very clean and easy to use, the WHMCS control panel section for Hexa makes adjusting settings easy also.