After a day of formal use and successfully registered 100 accounts, I think I have to say something. Although I applied for a trial before buying, but I didn't have much time to experience it. I am embarrassed to ask for a second time, so I decided to buy it directly. When I bought it and prepared everything, I found this tool so good that it helped me to register my instagram account quickly and cost-effectively, so I wouldn't be frustrated with the accounts block. The only downside may be that the email auto-confirmation success rate is not as high as I expected. Overall, very satisfied and worth buying.