I have been running a Dometic 65L for 5 years now and other than likely needing to do the fan mod and perhaps giving it a freon charge, it has been fine. When I installed it, I already had the upper and lower grates for ventilation of the previous 3-way so I wrapped the unit in Reflectix insulation and left the coil and fan area exposed for cooling and servicing. I also stuffed insulation in every nook and cranny in the cavity it sits in so overall the fridge is super insulated.
Sure, I could drop 1-2AH off the power draw by going to an Isotherm but in the long run I see it as being much cheaper just to add another 100W panel and save my self the labor and aggravation of pulling everything apart, buying a new fridge and selling the one I have now which clearly works.
I'd be curious to know how much it is actually drawing but all I know is that I have gobs of solar as it is and full batteries quite often.