I own the doser version, but if I had my time again, I would probably go for the doserless.
The doser version requires a modification to make it sweep the coffee out better.
I have done this. It is easy and effective, but for the price you pay for the grinder, something you should not have to do.
If you have a need to do many many coffees in one sitting, then the doser would be a useful thing, but in the main I think just resting the portafilter and going for it would be preferable to me.