Reformer Pilates - what level should I do?

It’s often a tad confusing when you first start attending group Reformer Pilates classes, when it’s time to move up to the next level. There’s often differences between practitioners' styles, modifications for clients within each session, and the same level class but at different times of the day. You may even attend the same class, with the same practitioner at the same time for a few weeks, and have a completely different experience each session! These are all common bits of feedback we get from our clients who attend regularly, and is also a common thread across most studios’ I’ve ever visited or worked at. So what do you do?