You can stick to your own schedule, if you want to stay somewhere longer you can, if you want to leave somewhere earlier you can (especially with the Half Monty package!)
You constantly get outside of your comfort zone
You meet so many amazing new friends from all over the world
You could potentially choose to travel with your new friends or stay solo travelling
Will make you become more confident in your own abilities and self sufficient in all aspects of your life
You will discover new things you didn't know you enjoyed, and may also discover things you don't enjoy
Soloing is better than group trips through a travel company as if you don't like the people in your group then you're f**ked
Solo travel is cheaper than booking a group trip through a travel company and gives you more flexibility
You will feel down sometimes but that teaches you how to deal with your emotions and just makes the ups feel much better
Overall it unleashes the sense of adventure in you
Negatives
Nothing
Choosing a selection results in a full page refresh.