It is stable and you can use free version

I love MAMP beacuse: - it is easy to download, install and run up - also you can configure PHP and MySql in a very easy way: you can change ports and server addresses in few seconds using its intuitive control panel - it's a really complete tool: it has everything you need to develop using HTML, PHP and MySQL; you can install Wordpress, PrestaShop and other similar platforms - it can be used on MAC computers

Allows me to easily setup Apache, MySQL, PHP on my Mac