The advantage of QB, for my small software training company, is that there is no longer a learning curve and there is no future cost with it. Once you've paid for it, that's it. We're still running a QB 2008 package and it's fine. We paid something like $150 back then for it. It does the basics that a small ISV would need - credits and debits, invoicing.<p>When I look at Xero or Freshbooks or others, the recurring cost is just outrageous by comparison. The cheapest plans they offer are $240/year. When I look at what I get vs. the cost, it's just not worth it for my business. Over the past four years, I've invested $150 into Quickbooks. If I used Freskbooks, for ex, for four years, I'm looking at a $960 cost. I don't need features that they offer so it makes no sense for my business to pay that recurring cost (time tracking, iPad apps, etc). Of course, there are coupons/promotions that I <i>might</i> be able to take advantage of one time but regardless the recurring cost is too much. QB2008 was solid enough that I struggle to think, "What would it take for me to upgrade to the new version of QB?" I can't think of a killer feature, for my business, that's worth another $190 (the new price) let alone $240/year in perpetuity.