I was using it to blow through an online math course I'd ultimately decided I didn't need but didn't want to drop. One step of a problem I had it solve involved finding the square root of something; it spat out a number that was kind of close, but functionally unusable. I told it it made a mistake three times and it gave a different number each time. When I finally gave it the right answer and asked, "are you running a calculation or just making up a number" it said that if I logged in, it would use real time calculations. Logged in on a different device, asked the same question, it again made up a number, but when I pointed it out, it corrected itself on the first try. Very janky.