They always have for me. Since the values ID uses are based on eBay prices, they are pretty accurate. I have used ID for years (with thousands of dollars of donations each year) and have never been audited. I have put in hundreds of "add it" items for things not listed in ID, but I use eBay values for identical items in similar condition. Just make sure you have a receipt from the charity. I always print out my ID donation page and staple it to the receipt.
I hope this eases your mind a bit.
