WSO2 ES has an elegant and attractive portal to browse the store. But it lacks the responsive design needed to adapt the layout to the device's size.
I know the code is fully customizable. But I think it needs more documentation about this.
Are you working on new designs for future versions?
At the moment ES only supports up to the tablet level, and smaller device support is already in our road-map and we are working on this.
You can find the ES source here[1], build and try improvements without waiting till the next release. You can report issues/features at[2] or [3].
[1] https://github.com/wso2/enterprise-store
[2] https://wso2.org/jira/browse/STORE
[3] https://github.com/wso2/enterprise-store/issues