The staff is VERY patient.
The minutes of waiting when there's no one there are simply due to the fact that they don't serve pre-made burgers. If you go when there are a lot of cars there, the service will be faster.
There are occasional forgotten sauces, etc., so it's up to you to check quickly as usual. For me, it's really not a big deal.
After all, it's still a McDonald's, so quality... eh 😉 Anyway, most of the employees are friendly even under pressure.
I've been there twice now. The first time, the restaurant was truly disgusting. The bins were overflowing, we were there for over an hour, and it took over an hour for them to be emptied. The sandwiches were just lying around even though there were hardly any customers. And don't even get me started on the enormous wait time—over 25 minutes for six Smart Meals.
Today, there were lots of young people shouting, and the floor was slippery and dirty. It's a shame, but I have no complaints about the sandwiches or the wait time today.