I would not recommend THUB. I bought this software back in 2006, and after 3 years of haggling with support and waiting for promised solutions to bugs, I have finally given up on Atandra. They have a paid support program, but they don't answer their emails and I could not once reach them by phone. They continually insisted that their software was working fine when it clearly was not. The item matching between QB and OsC is extremely complicated, and requires that you change most of your QB product codes. Once you have done all this work, then you still get errors.
I'm have high hopes that QBI 3.8 is going to work out for me.