Pros
Hatch's internship is great for building a solid foundation for young professionals. The size of the company allows for autonomy; letting interns experience different facets of the company such as recruiting, accounting, and sales. You will be assigned a mentor, and will work with him or her throughout the summer to track your progress and discuss feedback.
Each week you will have the opportunity to hear a speaker from a company in the greater Milwaukee area. This is one of the most easily overlooked benefits in my opinion. Not only do they provide you with valuable insight not available at other internships, but they are great for networking. I have already met with one speaker to discuss future employment. My experience here is an asset I can elaborate on in future interviews, something many interns from larger companies can't do, and has served as an excellent entry into my career.
Cons
Pay is commission based. You do get out what you put in, but in my case I had limited time because of a second job. Compensation is not ideal, but I wouldn't trade the experience for a bigger paycheck. In the big picture, the experience is more valuable than the paycheck. If you plan to work a second job, it's crucial you use your time wisely. Otherwise you'll find difficulty balancing the two.