I have been a ScanLister since 2014 in my book business. My business has grown and Amazon has made many changes, but Scanlister has evolved to meet my needs. They have done a great job keeping up with the needs of my business as things change.
I purchased the lifetime subscription and it has paid for itself a hundred times over in the time it has saved. The feature developments have been huge in that I can now print labels, upload bulk shipping plans, manage FBA box content and export accounting data all directly from within the app.
The few bugs I have encountered were resolved quickly and I love that Scanlister is always open to adding features and improving the software.