What do you like best?
Having a low end macbook that cannot be updated to Mavericks, Mountain Lion really does its job well. it is compatible with most software such as Microsoft Office, and running professional grade software pretty quick, namely the Adobe softwares.
Mostly it is the speed. Compared to Windows Vista I have previously used, this OS is definitely ten notches better. Also, the learning curve for this software is rather low, because it is designed to be easy to use.
What do you dislike?
The incompatibility with softwares such as the latest version of iMovie, Garageband and Skype proved to be inconvenient sometimes. However, it did not hinder my day to day use and still did the job for me.
Also, compared to the designs right now (flat) for Yosemite, the previous design seem uncomfortable for some of my peers while working with my computer. They are not familiar with my UI anymore, despite having used it for over 5 years (the design).
Recommendations to others considering the product
Although Mountain Lion is suitable for my use due to a low end macbook and limited funds, I definitely suggest one to buy a new macbook and update to its latest software. Many software are incompatible with Mountain Lion, especially the new ones such as the newest version of Skype.
What business problems are you solving with the product? What benefits have you realized?
Using Mountain Lion on a very old macbook is rather annoying sometimes, as the hardware is heavy compared to the new one, however, it can completely solve the business problem I have right now. Creating websites using open source software such as atom.io and brackets.io is rather easy and fast to use. Previewing using Chrome is easy as well. I think this OS is useful generally for software designer that has limited budget but want to appear professional, like me.