Like cycling there are always new kids on the block, fat bikes, enduro, gravel bikes etc. They are nothing new, a slight variant on an already explored path. CrossFit is like this. New and exciting buzz words attached to an already tried formula. In this case a well thought out compound movement circuit class with some bikes and rope work thrown in to add to the spice. Box evangelists will find my diluted view abhorrent. Give it a go, you have nothing to loose. There won’t be anything you have never seen/done prior, so don’t be afraid of terminology like WOD or AMRAP. They are just accronyms for things you will be sure to recognise.