I have the 23 SE and I have the swim platform on the back. I'm glad its there since it came with the boat, especially since I do fish alone alot, and getting back in the boat is a concern to me if I ever fell out.
Keep in mind that it is not all that big a platform. Also keep in mind that you have an outboard hanging off there that if someone slips and falls off of it, they could get hurt on it. Its not like a swim platform on back of an inboard boat. I do not let my kids use it unless an adult is there to help them. Most of the time I just pull them in over the side. For its size, I do like that little swim platform back there with the telescoping steps.