I was interested to see how it worked, and whether I could recommend it to my own clients to help them organise their tax documents.
The thing is, if you are a disorganised person - a pretty looking folder and program will not help you.
My recommendation is to buy a cheap scanner, and scan all your tax related documents you collect throughout the year to your computer as PDFs (or TIFs even). When it comes to tax time, summarise it (email or spreadsheet) and send it through to your accountant.
I bought the Taxstar product (which is a good product) - but I just didn't use it - I found it easier to scan and email all the documents to myself - so all the docs were saved in one place when I needed them.