Ranked in these QuestionsQuestion Ranking
Pro Easy to use
Pro Easy to customize
Pro A lot of extensions
Pro Based on Wordpress which is very popular
Wordpress is used by 25% of the entire web since it is well known by a lot of people, they won't get lost using WooCommerce. Wordpress is a solid CMS, it's important that the base of WooCommerce is not some amateur CMS. Wordpress evolves often.
Con Slow Slow Slow
Self explanatory. Does not scale.
Con Poorly customizable
Woocommerce is great for a quick launch without customization. But as soon as you need to add some new features, it really becomes a pain. WooCommerce is really slow, even if you get only a few products.
Con Horrible documentation
From a developer's standpoint. Documentation is snake oil. It looks pretty and gives confidence that you are able to work on woocommerce easily to make plugins that you need. Try using it. It is outdated and breaks.
Con Runs on Wordpress
Not a dedicated out of the box solution.