Advantages of Less

• Less is a CSS preprocessor. After compilation, it generates simple CSS which works across the browsers.
• Less supports cross-browser compatibility.
• Less codes are simple, clean and well organized because the use of nesting.
• Maintenance in Less can be achieved faster because the use of variables.
• Less provides a list of operators which makes coding faster and time saving.
• Less facilitates you to reuse the whole classes easily by referencing them in your rule-set.
• Less is new and preferred over the conventional CSS because may ease the lengthy styling.

Disadvantages of Less

• You must have to spend some time to learn Less if you are new to CSS preprocessing.
• Less provides fewer frameworks as compared to older preprocessor like SASS which contains frameworks like Compass, Gravity and Susy.
• In Less, there is a tight coupling between modules so it takes more effort to reuse and/or test dependent modules.