Is it better to create a new thread, or search-for and replay-to and existing thread? I reckon the latter is easier on the servers, but who knows.
As for the topic, I vastly prefer sliders with a top slide button. The classic Stanley metal utility knives are fine. I don't even mind using a screwdriver to change the blades. I think they are still made in the US. Might be the only ones that are.
I bought some Olympia sliders. The have a nice finger rest, and the slide mechanism is butter smooth. I found some at Big Lots for $2 each. I constantly misplace my utility knives, so I bought a bunch of them.