billing systems

Blesta 3.5 is now out!   Blesta has come a long way since their initial release of 3.0.  The new update now includes: - Config Option (Upgrades and Downgrades)   - Allowing Prorated refunds automatically for downgrades - SolusVM Improvements   - Extra Resources Ordering - Custom Reports I...

What do admins and clients look for in a billing system? If you started building a system from the ground up and you had or wanted certain features and modules added what would they be? We are asking this question because we are starting to build one and would like to get the options of everyone...