I own an AT Pro, and where I live I am not going to find gold bouillon, I am not near any Oceans, I just like being alone with my dog swinging in the privacy of a scouted out home site. Do I think it was worth the price? Sure do. I dug silver, in our clay soil, at 10 inches without a problem. I found many cool items, some deep some not so deep. Yes, I hit the same places a few times and found items I didn't the first time around. I assume it was me, not the detector. Just last week I hit my parents house again, and found a silver quarter which I saw once the detector hit it. I know I swung there before, or did I, but right before my eyes was the edge of a silver quarter. I laughed and thanked my Pop for it.
Bottom line, yep I think it is a good buy for the price, get the smaller coil if you can afford it; you'll thank me for recommending it. There are some good dealers on this site, check them out, there are some not so good dealers too, be careful. Wayne is a good one at MetalDetectingStuff, and so is Bart at BigBoyHobbies, both will help you any way they can, they will answer all your questions and quote you a fair price too. Good Luck!
Just to be clear I have no affiliation with either business so don't flame me for recommending them, I am just a guy that had the pleasure of doing business with these guys and both are first class.