A few days ago, I posted a question on a Ridgid X2 12v drill I bought that had a defective chuck (wasn't turning straight). I returned to HD with the intention of exchanging it for the same model as I was comfortable with it.
I asked the tool guy to open me a new box at the store before returning home with the exchanged drill, just in case. I'm glad I did. That other X2 had the exact same problem as the one I returned, and the HD tool guy was witness. I don't know if this was because of the "Made In China" QA control issue, but I decided to get a full refund instead.
I probably wasn't lucky with the batch they had, but it made a negative impression on me. If you decide to buy one of their drill, ask the HD employee to open the package beforehand so you might check it out.
Oh, as a side note, I asked how many returns they had on these drills, and they told me not much: 1 or 2 a week...