Never did I imagine that I would look forward to cleaning my toilet, but now, I will be doing just that. To start, you simply pull the brush straight up out of the canister holder to remove it. The canister stays open, waiting until you're finished, and then when you return, it self closes.  This is never a fun job, but it is one that has to be done. The top of the handle is shaped nicely and fits great in your hand. I noticed I didn't have to have a tight grip on the brush. 
The brush itself got up under the rim. The brush is also the perfect size to really cleans the area where everything you flush goes. I can't say enough how much I actually enjoyed cleaning my toilet.