My steps have been out for 3 years all year around. They look brand new. I also use my hot tub in the Winter more so than in the summer. They are very sturdy and well worth the money. The weather has not affected them whatsoever.
No they are two toned! Awesome set of steps though
Its probably not going to have longevity since its made out of some sort of plastic. You may want to purchase some cinder blocks for about $5 each and put wood on top. That will work. I thought about doing this myself AFTER I spent $$$ on this. Good luck.
Not to my knowledge .
They are not as durable as cement steps.