I'm running the latest version of Twin 1.2.1 and a lot of the old issues present in the older reviews appear to be resolved. Its quite stable and can cope with occasional loss of network connection, continuing where it left off (very useful for backups over 40 Gb). The reports are quite verbose if there are errors and it usually just requires a click of a button to redo failures.

Twin has a very good, very intuitive interface that offers AES-256 encryption on the fly. On Restoration its handy to have a listing to restore just individual files. The developers seem to be actively improving the software regularly over the last few months.