So one suggestion if you don't know what to look for in a walk through, or don't feel comfortable making sure you check everything, then hire someone for $200 (give or take) and have them do the walk through/check out everything.
Having said that, if you already signed the papers, then whatever they find will likely be fixed on their schedule, not yours. What Im trying to say is as long as you hold out signing the papers until after you do the walk through, and insist anything identified that needs to be fixed prior to signing the papers, then you are in control. They would want it fixed to get you to sign.. now you signed, so leverage is less. Regardless, that's probably not a huge deal, as anything that is identified would still be fixed.
Mike