The company provides a great way to start a career in the IT industry, an industry where entry-level jobs are being outsourced left and right leaving little chance for the rest of us.
Cons
Making a mistake with interviews and soft-skills training may get you verbal and/or written warnings even if you're new to the job.
Dexter Systems helped me jump start my career in developing. I hired as an Intern and then got full time position I took their two week training in Java and they found me a project within a week.
One benefit of being Dexter Systems employee is that you get access to all the training programs (which are world class) for free.