Before we ended up with our wonderful 23SS, we ordered a ROO 19.  Just 2 of us 99% of the time and we couldn't see why we'd need anything more.  FR was up to their eyeballs building 21SS and 23SS models at that time and our 19 never showed up for months.  Meanwhile, we got with our dealer and made the change to the 23SS and feel like the RV Gods were watching over us.  Our DF with the 19 always wanted to spend the evenings playing cards, etc in ours because it was much more comfortable.  You add our 80# Sam + their 45# cocker to the mix and the 19 was pretty darned snug.  That's certainly not to say "don't buy it"...it may be exactly what you want, need, is a nice plan, can tow safely and fits the budget.  You do have both the sofa and dinette, which is a huge plus.  The kitchen area is pretty slim on workspace.  The bathroom is the bathroom.  When our DS#2 and both DGSs joined us for a weekend, I am sure there would have been some unpleasant moments cozied up in the 19.  Agree with Chuck, if you have the ability to safely tow a 23SS or 21SS, suggest you check both out before you sign on the dotted line.  Too bad you weren't here about a month ago....we just sold our mint condition 23SS to make a change to a TT.  The family that has it, got a good-as-new ROO 23SS for about 1/2 the price of a new one.
BTW, welcome to the forum....they were nice enough to let us hang around even though we moved to the darkside.  Good folks with good info on here.