Ranked in these QuestionsQuestion Ranking
Pro Available in most hosting services
Because of its portability, popularity and robustness phpMyAdmin is included in most hosting services that support the LAMP stack.
Pro Easy installation
The installation process itself is very simple, you need to have PHP and MySQL installed on your server, extract the files to a specified directory and run the install script. If you get stuck somewhere there's a lot of help online. The official wiki is very good too as far as the installation goes.
Pro Complete functionality
phpMyAdmin is very complete as far as features and functionality goes. You can even build a full website without knowing any MySQL.
phpMyAdmin can run in a web browser, this makes it a very portable tool because it can be run on any computer and on any OS as long as it has a web browser installed.
Pro Easy to edit
Editions can be performed over a result table just by clicking the desired field.
Con No code higlighting
phpMyAdmin does not have any code highlighting or autocompletion capabilities, unlike other options.
Con No schema visualization
Con Confusing interface
It may take some time to get used to it.