I've been using "It's Deductible" for years (it had a different name then, and was a booklet instead of software). It has very detailed lists (instead of just listing men's pants, it would have differerent listings for men's jeans, dress pants, casual, etc.) and each item was valued in good, fair, and poor condition. If you make a lot of non-cash donations, it is WELL worth it. I get full value for my donations and have them to back me up if there is a question about how I valued my items.
alm99, what I do is lay everything out on the floor and take a digital picture. Then I make my own itemized list, and staple a print of the photo, the charity's receipt, and my itemized list together each time I make a donation.