Any startup that wants to tackle this space should: 1) allow import of Quickbooks files, and 2) have a free option which allows you to import / type in numbers and run a simple report. Then, if you want more automation or detailed reports (e.g., for taxes) then you need to pay up.
Basically, I'm not going to pay up for something I can't test drive (for like a year), since both my accountant and I are already used to QuickBooks. To overcome my inertia, you have to blow my mind with your features and/or your pricing model.
The same problem exists on the personal side: There does not seem to be any decent alternative to Quicken.
Also the guys there are pretty cool