Question about installing a Pergo flooring. When installing Pergo on a
concrete floor is there anything you have to do differently than
installing one on a floor with a sub floor made of wood? If the
concrete isn't perfectly level, is there a problem where a sub floor
made out of wood might compensate for it not being level? No give. The
concept of it being a floating floor with that sponge, does this cause
any problems with bunching if the floor isn't level? Any thoughts or
experience would be helpfully. Thanks.

There are several Pergos the regular one is not intended for damp
locations, Slab on grade brings up moisture even if not visable. Unlevel
is ok, bumps are not. Any moisture trapped will eventualy lead to mold
and smells. It all depends on your house.