My wife and I just bought a Siesta Sprinter 24SA. I think the Siesta and Citation are pretty similar? Ours is on the Mercedes diesel chassis - is that what yours would be?
We have the 24SA, which is the one with the bed in the corner.
We took possession just 3 weeks ago, and this is our first RV experience, other than a 2 day rental a few months ago. We have been out for 2 overnight trips, and it seems quite comfortable. A *lot* to learn!
Good luck, and let me know if you have any questions.