I have had 2 of these replaced. I'm glad I bought the extended warranty. The power switch broke both times, took 6 weeks to replace with the warranty but wasn't out the money for the item. Get the power supply, it comes in handy. But a good learning tool but picky on which files it will load

I got my GT1 over a month ago. I am still waiting on the power supply. Without the power supply, operation on a fresh set of batteries lasts for 1 hour. I have used the GT1 for 5 hours and had to quit because I didn't see the sense of replacing the batteries until the PS was avaiable otherwise. By now, I would have sunk about 100 dollars in batteries. Next time, I will be checking on the availability of the PS for sure. This is unbelievable, terribly ridiculous. The GT1 is such a terrific practice tool but YOU NEED A POWER SUPPLY! What is up with this? I am not happy at all.