Pros
Some benefits are that you work from home, but must be at your computer/phone during normal business hours. They provide you with a computer and reimburse your Internet cost.
Cons
If you like to be a teacher, school secretary, counselor, tech consultant, and parent to your students, then k12 is the place for you! Plan on spending half your day teaching your students and the other half being secretary and tracking your students attendance, etc. Also, you can have over 200 students assigned in your course you teach (grades 6-12), but then also have 60+ students in your homeroom. All of your data is based on your homeroom student's progress in their courses (even though the homeroom student may not have you as a teacher). k12 is 100% business minded and is a huge change if you are used to teaching in a classroom.