I bought these to convert one of my road bikes to a from road bars to mtb. Levers for V brakes don't really work very well with road callipers but as I'm used to riding a fixed gear, these offer more than enough braking power.
Quality is good given the small cost.
Bought to replace old non-V brake levers when bike was retro fitted with V brakes from centre pull. Thought I might get away with usuing old non-V brake levers, but found using standard levers on V brakes is a big no-no. Brake control was either on or off and easy to lock up. These gave back perfect control and the braking is now fantastic, controllable, responsive and excellent at stopping compared to previous brakes.
Easy fit and seem to be good quality. Work v.well.
No negatives whatsoeve in fitting or in use.