If you a familiar with acid brushes, this is the same as all the rest. The quality doesn't seem any different no matter where you got them from. People with poor reviews expect far too much for far too little and don't understand the intent of these brushes. Personally I use them for grease, anti seize, contact cement, gasket maker, wood glue, etc..... I do use them for paint, but only in places where brush marks don't matter (I've used them to paint serpentine pullies, while the engine was running - not a task for a good brush!). Yup, they will leave horrible brush marks. Yup, bristles can fall out. Yup the metal handle can have sharp-ish edges. Nope, they don't clean well. If any of that bothers you, you are looking at the wrong brush for the wrong job. If you get the intent and know what an acid brush actually is (and that is a cheap-az brush to slop misc goop on and then throw away), buy with confidence - same as it ever was....