The reformer is an amazing machine. Sturdy, comfortable and gentle on the joints, but can also give you possibly the hardest whole-body workout. It uses a combination of smooth bearing rollers, sailing-quality ropes and pulleys and springs of differing strengths to provide a wide range of exercise opportunities.
The all levels reformer class caters mainly to members who are beginners to intermediate, but advancing options for movements are always available to those who want the challenge. It also utilise small apparatus (balls, bands and rings) to keep your muscles guessing.