I installed the large (TF-130) 12V only Truckfridge last year and have generally been very happy with it. I saw no point in buying the 12V/120V model as I have a good converter in the trailer already converting 120V to 12V. The biggest pro to me is the seamless, set and forget operation. At home the trailer is plugged in so a couple of days before a trip I turn the fridge on. Upon leaving I unplug from shore power and it runs off the battery/tow vehicle. In camp it continues to run off the battery/solar/shore power as provided.
The biggest pro is it gets real cold, real quick. It does however draw a little more power than I thought it would. Probably because we run it a little too cold and open the door a lot. You can feel the "cold dump" on your feet when you open the door.
If I had it to do over I might go for the next size down for the trailer. If I needed more space than that I would get one of the nice portable, chest type models to supplement the mounted unit. This portable unit would be nice for taking in the tow when mobile, running it off the tow's power, using it alone for short trips, and not having the cold dump of a vertical unit just to reach in for a cold drink or sandwich fixings.
So I would say carefully and honestly assess your refrigeration needs/wants and purchase accordingly. One of the bigger portable chest type units might work very well and have more utility than a fixed unit in the trailer.