Just hit one year as a member of Orange Theory PV and it truly has been life-changing. My issues with working out are quite common - I'm a professional with very little time, repetitive workouts bore me to death, I HATE gyms filled with meatheads, and only scheduled classes provide the discipline and accountability I need. So I tried OT after many, many failed attempts and finally found a home. Every workout is different, and they all have a common theme - they are incredibly challenging and I burn at least 800 calories in 60 minutes. I'm 39 and in the best shape of my life and I only have to invest 3 hours per week. I love the small-format classes - they play great music and you get personal interaction with the instructors (unlike Crossfit, they aren't a bunch of firemen and Olympic shotputters trying to make you throw up). The instructors are highly-competent professionals who are fully engaged in their work, and they each have a unique training style. The PV team is led by Daren Parks, whose credentials are extraordinary - over 25 years of experience in some of the country's top fitness facilities. He will push you to your limits and relentlessly inspire you at the same time.
Obviously any membership-based fitness program will have detractors, usually over some trivial contract issue. OT makes it as easy as possible by offering month-to-month memberships if you want them. Try it, then stick with it, and you'll see amazing results. I'm not an employee or an investor, just a really, really satisfied member.