Not at all. I'm very happy with them, I've installed 20 of them now. (we have a lot of cabinets). Highly recommended. on installation, here's a tip: When installing the latch part, put the screws in the center of the holes, it allows for final adjustment without redrilling. Once I figured that out it went like clockwork installing the rest.
The lock isn't visible while the door or drawer is closed. When it's opened, about an inch and a half of the mechanism is exposed, so that you can push on it to open the door/drawer the rest of the way. These locks work very well to keep our (much too intelligent) cats out of the bathroom cabinets and drawers.