BEST - hopefully will be 2005 Quickbooks Pro but have not set it up yet. I got "Quickbooks 2005 The official Guide" book by Kathy Ivens. to read up on ins/outs of Quickbooks. I have an accounting background but never did like accounting (to boring for me) so hopefully I can pickup Quickbooks fairly quick. WORST - luckly nothing since I always go to lawnsite to research what everyone thinks of a product before I buy.