my app invoiceit has been on the market since 2002 and has been sold in over 80 countries. I have recently completed an overhaul (previously based on Access97 and now Access2010). I need someone to go through the app with a 'fine toothcomb" to find bugs, errors, inconsistencies, cosmetic problems. It is a big app, so I have budgeted for about 50 hours' work. Some business knowledge would be helpful but not essential. The idea is to simulate someone who dives straight in without reading a manual and expects everything to happen. Can this person be tripped up? I would like my tester to check all the functions they can find and report any issues. For this, there is a shortcut built into the app to make location of error easy. The old version is at invoiceit.com, to give you some idea.