Thank you very much for developing this! Really glad to ditch ROM manager!!
Here's a bug I'm facing using it on my Galaxy S3 (i747) running CM10.1. When backing up to either "internal storage" or "external storage", both gets stored in the internal SD. I would like to be able to back up to my external, removable microSD card. Bug still present as of 5.3.21.
Also, a feature request. Would be great if we have the ability to schedule automatic backups at specified internals at specified time, to specified location. This feature is supposed to be present in ROM manager, but it never worked there for me. THANKS!!! :)