I can only speak to the 2011 23 FB, which we had for almost two years.
The bed is queen sized, but whoever winds up sleeping on the far side (front of trailer), has a difficult time getting out. This holds true to the FC or the International.
The bath is nice, however, the toilet is designed for a pro basketball player (when setting, your legs don't touch the bottom of the floor.
Our shower was problematic (it leaked from the get go), and was never fixed to my satisfaction. AS changed shower doors in 2012, so that gives you reason to assume others had the same problem.
Overall, the trailer is good for a couple, but the dinette is the only place to set, and the 2011 dinette only seats two, due to the wheel wells. The new 2014 FB solves that problem by using the same seating arrangement as the 22. The 2011 seating is difficult for the person who faces the bathroom when it comes to watching TV.
We moved (and I suspect many others, too) up to the 25 for the above reasons.
Yes the new trailers are pricey, but with this kind of investment, getting exactly what you want is important.