[Storyville]

I would avoid this technique if at all possible for a number of reasons.
1. I find it tends to make my brain here a "weird" stereo image, rather than a "wide" image.
2. It's indicative that the source sound in and of itself is not full enough. Track a cab with a single mic often causes this problem. Using multiple mics is often the best way to track a guitar.
3. This can cause phase issues when summing to mono, especially if you are below 10ms in delay.
4. Using this technique on multiple sound sources diminishes the image, especially if stacked the same way (always delaying on one side), and will actually suffocate the mix rather than opening it up.

Use multiple mics. Use the clone and pan technique as a last resort. Thems my two cents.