The reservoir doesn?t hold enough toothpaste for a week on the road (I brush at least twice a day)
The brush (stem) is not long enough causing the thick round handle (which is likely not clean as it is not protected/covered) to enter your mouth when you are brushing your back teeth. Somehow that is not comfortable, but certainly not a pleasing thought? considering so much thought went into this product?s design, this was surprising
The brush-head cover seals in moisture/keeps out germs (which is good)? except that the bristles stay soft (because they are kept wet)? and, though I haven?t experienced this yet, I?m guessing eventually some form of mildew / nasty smell will eventually be the result. In any case, the effect on the brush is to be about as effective as the brushes you get for emergencies at hotels, or in international flight bags.
I bought one clear and one chrome? I can see now the chrome one looks a bit like a female ?massager? I definitely prefer the clear? I see other colors now on your website? smart.
Finally, it is hard to dispense ample toothpaste? one trick I found is to hold the too brush pointed down so gravity helps load the brush? the other tip which proved most valuable was to squeeze the toothpaste tube some while loading the handle (perhaps that tip should be more prominent) as the result is more even / easy filling of the reservoir.

I will be making a blog post soon, and commenting on some of the blogs that caused me to purchase in the first place. Please reply if there are other tips that might enhance my experience with your product, otherwise, I think it is best suited for backpacking and camping ? and for the briefcase or purse for emergency brush-ups.