My parents used to have a 23B, that was their step between a pop up and their first fifth wheel. They liked it a lot, it was a super popular floor plan for Jayco. The slide isn't very deep, but it does make it feel quite a bit bigger inside. You do have to climb over the dinette to get into the front bunk, which is kind of annoying, but you get more sitting space in that one.
Hybrids can be hard to cool in direct sunlight, but there are workarounds for it. Pop Up Gizmos work very well, even our 3 bunk with all that canvas, we could keep it cool with those covers on.
I think a lot of people get into the hybrid and decide it's more work than they thought. Folding the beds down isn't that hard, but you have to make the beds, and you have to have somewhere to put that bedding in between. For a weekend, not so bad. But for a long trip where you are moving place to place, it gets pretty old. Having beds already made when you arrive sounds like such a minor thing until you travel that way for a while:)
It's possible hybrid camping isn't what they hoped it would be, and like you they bought it used so they figured they could try it out without taking a big loss.
