There is nothing wrong with the Treasure Ace 250. I have one as a back-up and for someone starting out. I use the analogy in motorcycles. My first bike was a 90cc Honda (I loved that machine), then a 250 cc kow, then a 550 Yamaha, then a Harley Sportster. Each one was better than the previous one, however I soon learned their limitations. The same with metal detectors. The 250 is great in parks and other areas where a coin dropped 20 years ago might be only an inch down in the ground. However, at a beach along the ocean the same item could be down a foot or more. A 250 can go in areas my expensive machines can’t, such as playground equipment. I have one machine with a 16.5” coil that I can not turn on in a room. It won’t shut up. Stick with the 250 and learn its limitations and get what you want in the next machine. Most of my machines have paid for themselves. Besides, when you invite someone to go with you it is nice to have a back-up machine. Good luck and I hope this while help you.