I wanted a toothbrush that keeps a longer charge so I don't have to carry my charger when I travel; thus the main reason I purchased this one. It kept the first charge for 22 days not 4 weeks but good enough for me. . My travels usually don't last more than that. Besides I always carry a regular toothbrush anyway just in case. It is sleek looking, it does it's job at keeping my teeth clean and my gums feel good. I don't use the tongue scraper, I am used to using the bristles to clean my tongue. I think it has too many features but some people may like that. I doubt many users actually look to choose these features with the toothpaste on. I don't see the difference with the daily and white features, why not just say the daily does both. It's inevitable that the brush massages the gums while using it so why the gum feature. It came in what feels and looks like bullet proof box that can be used as a weapon or you can throw it across the room and your toothbrush will remain intact. The replacement toothbrush heads seem to cost a lot, I hope the price will be a lot less when I need to purchase new ones.Edit: the first charge lasted 22 days, second charge 21 days, third charge 21 days, fourth charge lasted only 14 days with the last 5 days before the battery completely ran out pressure was decreasingly getting weaker and weaker. Needless to say I am getting disappointed.Second edit:2/20/22 As to how long the charge lasts, I realized that I was charging it for maybe 8 hours or less. If I keep it charging for close to 24 hours it lasts 21 days or more. Also, someone made a comment that you can only buy the replacement heads from their website. For me this is best since it is free shipping anyway in the US and Canada. It is still the best electric toothbrush I ever used so I am changing my stars to 5.