Roundcube Integration

Does anybody know how to integrate Roundcube and SuiteCRM 7?
The email client/module of Suite CRM is just not efficient and has a lot of glitches.
I love Suite CRM but there are things like this that are just not efficiently designed. The email client is so basic and it has lots of issues. there are already opensource email clients that are properly setup, I don’t see why SuiteCRM should even have its’ own email client if it’s going to be problematic.
If anybody has found a way to integrate with Roundcube, perhaps it would be nice if you can share it here. I am sure almost everyone is having problems with the current default email client/Module within SuiteCRM and this would fix the problem many people are having.