A friend of mine has the Gold Bug Pro now and I use the Teknetics G2. Same detector except the rod/grip package. He likes the stock 5" DD coil for the trashier sites and that's what I mounted on my G2 for such tasks. Coin hunting? Yes, but only because coins might show up. When I am working old house tear-downs that date from about 1875 to 1920, I am not only after coins. I enjoy all neat small artifacts (aka relics) that might be found there, such as thimbles, trade tokens, buttons, and just a lot of neat, small, non-ferrous stuff.
The same is true when I head out to ghost towns or 1800's era pioneer and military encampments. Yes, I use other quick-response detectors like the T2 and Omega, but the G2/Gold Bug Pro have their place due to the simple yet versatile settings. Oh, my friend ordered in the 11" coil that was on special for his Gold Bug Pro for sites with less trash, and I have my stock 11" DD on a spare lower rod. The G2/Gold Bug pro are not the deepest-seeking high-conductive coin finders, although they do okay, but with the 11" and 5" DD coils you have all the bases covered for most hunting needs. Then, if you're looking for simplicity yet great performance on most relic-based targets in the lower to mid-range of conductivity, you will definitely be impressed.
Now, if it will just warm up here in NW Oregon. My friend has his down in Arizona for the next month and a half and I can only envy him in the more comfortable weather to enjoy at those old sites that have been producing.
Monte