I have a 2014 FR3 25DS (chassis was made in late 2013).
Take extra time with the walk through (PDI i believe is the term).
Have them demonstrate all the systems not just point and say press this to do this. This period units had an issue with slide motors stripping their gears. Only way to find out if you got a bad one is to operate the slides enough. I had my bedroom unit fail in the first year and was covered no issue. Takes about an hour to open up the motor area and replace the motor. Not a hard job but you have to have the spare motor (both slides use the same type motor so i bought an extra on ebay and carry it in the basement....which pretty much insures the ones in use will never break
) The good news is the slides can be assisted in/out even with a broken gear motor. Just push while somebody presses the button. Havent heard anymore about these problems and the motors are working great. YMMV not all got bum gears. Paid about $125 for the spare motor to have on hand.
Had a weird jack problem covered under warranty but it was a singularity...and involved a sawz-all
Also had an issue with the generator which Cummins covered. Buttery fly on the carb broke ....
Since fixed no issue.
Last few trips have all been event free
You should be able to get some serious savings on that coach.