Save money
There is no question that one-to-one is the most efficient way to learn pretty much anything.
And I offer considerable discounts for package deals – see Fees.
Have fun
Going to self-defense classes with friends or colleagues can be more fun than a good few regular gym classes.
Once you have done a course of group classes and learned the basics, you can always build on this knowledge and fine tune it with a few one-to-ones. Or advanced group classes. Just make sure nobody chickens out…