Administrators are rude, if you do not ask for a receipt for the work done, then you can be charged too much, in general, the center is clean, the doctors know their job.
There are two queues in the clinic, one by appointment, the second live, created for insurance if someone suddenly does not come, so as not to lose profit, and the fact that people sit for several hours and not the fact that they will be accepted, no one cares at all