I mostly bought these to use in my workshop because I needed really soft brushes to clean uncured resin from MSLA prints. The charcoal brushes do shed some charcoal residue at first, so I'm using those to brush my teeth and the white ones in my workshop. The bristles are super soft, exactly how I needed to clean the prints. They're softer than the soft brushes I found elsewhere, which is really nice. The bristles will melt in a heartbeat if you do like I did and use one to clean the still-hot nozzle of an FDM printer. However, these brushes stand up really well to repeated use in a bath of isopropyl alcohol. For brushing my teeth, the charcoal ones were really great. I don't use them exclusively, as I have three different toothbrushes I rotate between, depending on my needs. The thin bristles of these brushes do really well getting into the tiny crevices my brand name toothbrush can't. Like seriously, I'll brush my teeth with whatever brand name toothbrush from the store that has all the fancy bristles and rubber squeegee things and then brush my teeth with these and they'll dislodge something the other one overlooked. However, they're not as good when it comes to anywhere there might be some buildup that was missed in previous brushings, like around crowns. They'll remove any debris, but since they're so soft, they don't scrub very hard. If you are a strict brusher and flosser doing it several times a day, this brush will be adequate. If you can't brush after every meal or snack because of work or whatever, I'd recommend supplementing these with one of the brand name brushes that look like they were engineered for alien teeth. Aesthetically, I love these brushes because, unlike my regular toothbrush, they don't look like a tennis shoe. They're very simple and being made of bamboo is a plus. The bamboo holds up well to repeated brushing, which I expected since I use bamboo cooking utensils. My only disappointment was that one of the white brushes was missing, so I only have four of those. I don't know if that's a quality control issue or what. I didn't contact customer service because it was too much effort for one toothbrush. I'll most likely buy these again when I need more, since I've been using them in multiple applications.
