The paddle is usually my favorite style of holster, and Galco products are generally well-made (I own several), but I found the Galco paddle to be uncomfortable to wear. As others have noted, they also hang pretty far out from the body, so they're difficult to conceal. I'd strongly recommend trying one before you buy.
The most comfortable paddles I've worn are Safariland (the soft suede style) and the Blackhawk SERPA. Here's the SERPA carrying a J-frame Model 342--it's lightweight, extremely comfortable, and easy to conceal because it doesn't sit too low or too far out to the side:
Any issues with the retension system locking up on the SERPA?