You don't mention how many in the family....that makes a difference in my suggestion. We had a 23SS and loved everything about it, especially the large kitchen area and great interior storage. If you have 1 child and don't plan on expanding that number any time soon, then I would say the 23SS. If more than 1 child and you think you'll want to keep this trailer for many years, then definitely the 233S....the major reason being that somewhere down the line, they're going to want to bring a friend and you won't have to mess with setting up the dinette or sofa at night and taking it down in the morning. Or the same applies if you see that family or friends might be joining you, that 3rd bunk would be invaluable. The downside is that you have to look for campsites and the utility hookups differently than you would with just the slide on the 23SS. IIRC, the slide on the 23SS is maybe 15 - 18", but maybe someone with one sitting at home could check that. We never had a problem with sites, but with our new TT having about a 3' or more slide, we have to watch for those things and sometimes shift over in the site to clear utilities especially.
I'm not a big fan of the rear slide units in general. You can also run into the tree problem at the rear of the site, but in some cases you lose access to the frig and/or bathroom while on the road. That may or may not be the case with this model, can't recall.
For many years the 23SS was the top seller of HTTs and having one makes it easy to see why. Very functional, comfortable to spend time in during bad weather, exceptionally nice kitchen area. Just depends on how many in the family, how you use your camping time and what "feels" the best to you. Good luck, they're all nice.
