What is Your Experience with the IRS and Your Business Taxes?

I recently received a notice from the IRS relating to my business tax return from 2007. I talked to my CPA before I replied, and I also called the IRS just to be sure I was giving them what they wanted. I found the person I talked to knowledgeable, and I didn't have to spend much time on hold. (Of course, this isn't the middle of tax season.) They were slow with their written response, but they sent a letter telling me that they were working on the issue, which I thought was helpful, kind of.

What Has Been Your Experience with the IRS? Have you found them helpful? Or has it been a nightmare? If you have an IRS story, particularly one relating to business taxes, write it up briefly in response to my "Readers Respond" article: What is Your Experience with the IRS?

By the way, the issue was resolved. I actually got a small refund.