Old forum message, message now gone, but here's the summary - I have not used, only made note of the product "Matt with Grass Valley Canopus in their tech support department stated that the 110 will suffice for most hobbyist. If a person has a lot of tapes that were played often the tape stretches and the magnetic coding diminishes. If your goal is to encode tapes in good shape buy the 110, if you will be encoding old tapes of poor quality buy the 300"
http://www.grassvalley.com/products/advc55 One Way Only to Computer
http://www.grassvalley.com/products/advc110 for good tapes, or
http://www.grassvalley.com/products/advc300 better with OLD tapes
ADS Pyro http://www.adstechnologies.com