Mat – I just treated myself to a Joystick (one of the new brighter ones).
As to if it’s “worth” spending the extra, up to you. I will say however I think the exposure kit is good value.
It’s not cheap, but it is very well made and thought out. Great mounts, great ui – I like being able to program to have the modes I want and only those modes. It feels really robust, and the quality/spread of light is great as well as the quantity. Also the no faff is pretty good.
So yes, expensive, but also good. You’d be fine with cheaper lights I’m sure, and I’ve had a light from MTB batteries before and it was decent. But sometimes it’s nice to have nice things, and if you can afford it why not? Just decide if you want to spend the money, I don’t think you’d think you’d wasted it. Also check the exposure outlet store for cheaper last-years models.