I was lucky enough to have a free trial of BESTEK Electric Toothbrush, so I'd like to share my reviews with you guys here.
It's said that it's made of food-grade Dupont bristles and have FDA certified, which really makes me feel safe for daily use. Besides, it has 3 replacement heads(1 U-shaped & 2 wavy-shaped) and its back rubber coatings can help clean my coated tongue effectively. 3 modes (standard, soft, whitening) and smart timer (2/2.5/3min) are so convenient to use! More importantly, I was deeply impressed by its travel case because it's easy to carry and charge wirelessly no matter it's put flat or upright on the desk.
All in all, it's cost-effective. Try it, you won't be disappointed!