I used the Atol online cash register for a while until I found another service that combines offline and online cash registers. It turned out to be significantly more cost-effective for me. Here, you have to pay 3,000 rubles a month for the cash register rental. If you need a fiscal storage device, add about 10,000 rubles upfront for its rental for three years. If you calculate the average monthly cost, it comes out to more than 3,000 rubles. My current solution costs only 500 rubles a month. They provide the cash register as a service, and it's a cloud solution. The online cash register is rented out. This is the Atol 42FS cash register, if I'm not mistaken. Right now, without such a cash register, you can't do anything in online sales if you don't want to face fines under the 54-FZ law. I have no complaints about the operation, except for the price. The integration with the payment aggregator went smoothly, and it's convenient to get the data for registering the cash register with the tax service in the personal account and to monitor the cash register's status. From Atol's side, there have never been any internet issues; access was always 100% of the time.