Unprofessional hotel WIFI details:

The hotel guests enable cell phone WIFI connecting, dozens of WIFI ID on the list, the hotel guests have no idea which one is correct (reasons: without AP control equipment, every AP is independent).
The hotel guests choose one of WIFI ID from the list, but it can not be connected (reasons: the equipments of former guests still on the AP list occupied the limited resource of the AP).
Even WIFI connecting is OK, and signal is good, but the hotel guests can not access the Internet (reasons: many AP on the same channel, interference each other, so no one can access the Internet).
The hotel guests have to reconnect WIFI from the hotel room to the hotel restaurant, maybe the former problems appeared again (reasons: the AP is independent, so the equipments of the hotel guests can not roam between the different AP).

Professional hotel WIFI details:

The hotel guests enable cell phone WIFI connecting, only single WIFI ID on the list (reasons: every AP is under the AP controller management, so dozens of AP only have single WIFI ID).
The WIFI connecting very fast (reasons: the AP controller reboots all of the AP every day on time, release the AP resource for the new hotel guests).
After WIFI connecting finished, every one can access the Internet (reasons: the AP controller setup the most reasonable channel for the different AP, such as channel 1,6,11 etc., avoid to interfere each other).
After WIFI connecting finished, the hotel guests can access the Internet anywhere in the hotel, there is no need to reconnect WIFI again (reasons: every AP is under the AP controller management, WIFI connecting roaming is possible between the different AP).

The diagram of Mader Low Cost Professional WIFI Solution as follow:

AP Controller

Panel AP

Ceiling AP