The first part of the class is a warm up, cardio and conditioning session. This was surprisingly punishing - a decent workout, done quickly and efficiently. There wasn't any pressure to be able to do everything though (I couldn't) and there were clear safety instructions given. Even so, I'd say if you feel you fitness level is very low, this section might make you a bit unhappy.
The second part was spent learning choreography - a tricksy little routine to Beyonce's 'Partition'. This was really well pitched; achievable even to someone with next to no dance experience (me) but complicated enough to challenge everyone in the class a little. It was a lot harder than I'm used to, but I felt really gleeful when I got it.
The instructor was charming and competent and I really liked the studio and music choices. The best thing about the class was the atmosphere. Everyone was really friendly and focused but having fun. It seems like the kind of place you could really make friends.
Raw Diva is much more interesting than a lot of the "dance fitness" classes I've been to. Its original choreography is taught by someone who wants to see you get it right, not just cardio done vaguely to music. You go through things a lot, and you're encouraged to ask questions and really engage. It was nice to go to a class that had high expectations and demanded proper work, but also kept the routines inclusive and fun.
There are two drop-in classes a week, with no expectation that you'll come to both, or go every week, but if you do want to get really into it, there's a performance group class as well. I also thought the class was great value - £5 for an hour, with the tenth class free, is extremely reasonable.
Overall, this is a fun and satisfying class, delivering a decent mental and physical challenge in a friendly atmosphere.