My experience with DRG has been mostly positive. If you have no dependents, few specific skilled qualifications, are looking for a ways to earn field experience, and save away income, it is pretty good. DRG will take basic care of you as an employee. You'll be able to get lots of hands-on experience with project management, working independently or in a team; you'll get work work outside of an office, and travel to different parts of the country, and with relatively flexible hours/ vacation. Not in the office, but in the field at least, workplace politics are kept to tolerable levels and everyone has each other's backs.
You'll have to learn to roll with management being in perpetual disarray, never knowing where you'll be until a week before you start (if you're lucky!), being low-balled on wages and per diem, zero concept of work-life balance, etc. Overall, pretty tolerable if the rest of the job market doesn't look good.