If I buy something with one of those 3 way fridges in it the first thing I do is tear the fridge out and sell it. Then I fire a 12/24 compressor fridge into it. I picked up my Waeco fridge of Craigslist for $220, in excellent condition, and it has numerous advantages over the absorption fridges. It will operate at up to a 30 deg angle, no open flame (can fuel up with it running), costs nothing to operate (after the initial expense and I'm on solar), cools down much faster, and requires near zero maintenance.
If you check through the forum threads, there are a few concerning the pros and cons of the 2 types (also Peltier junction units.. which are total crap). ..Willy.