Robert,

Are the switches with the push-in wire connections option as good and as
reliable as using the conventional screw terminals ?

I wouldn't use the push-in connections on switches/recepticles. I don't
think they're even allowed by code anymore? They rely on a spring contact
which could theoretically weaken over time, allowing overheating, arcing,
fires, etc...

In any case, the screw terminals will provide a stronger, more reliable
connection. Just remember to wind the wire around the screw in the
direction the screw turns.

My favorite switches/recepticles are the ones that use a clamping plate
under the screw. You simply strip the wire, insert it under the plate, and
tighten down the screw. The ease of the push in connectors, with the solid
connection of a screw terminal. Best of both worlds. But, they do tend to
cost slightly more. No biggy for one device, another matter when you have
dozens to install...

Anthony