Performance for the .Net integrations is dependent on too many factors. Performance of the computer it's running on, as well as performance of both the CW and accounting servers.
It's very very unlikely if possible at all that our integrations are causing the performance issues.
Things to check in case of performance issues:
-Ensure that Sage 50 and the Mobius Integration are both installed on the same workstation.
-Ensure that .Net is up-to-date on the workstation where the integration is installed.
-If you're having problems with the integration and you have your data on a separate server, the first step of troubleshooting will be to install the Sage client software and our integration on the server and test it there. If it runs there but not on a remote client machine then the problem is likely a network or permissions issue that we're not responsible for resolving.