My trailer has the rubber coin flooring, (its a one piece sheet kind of deal).  it has been fine since 94 when it was put in, but it is super cold in the morning.  I went down & bought some "industrial carpet" (Like you would find in an office building) & laid that on top and its been like that for 3 or 4 seasons now.  seems to work fine & is quite a bit warmer.  Now I get to vacuum the floor of the trailer.  LOL.
the drag race team I used to work for had a Toter that had tiles & they started to crack & pop up, so they had them replaced with rubber coin flooring.  that was a huge mistake............  the slide out sinks into the rubber flooring & now has to be pushed on by 2 folks, while the button is being pushed.  I thought a laminate flooring kind of thing would work well as long as the "grain" was lined up right for something with slide outs.