keel cooler good or bad?

[SailDan]

A friend of ours just put in an offer on a 1989 C-34 which does not have a refrigerator.  Someone told him about "Frigomatic" made Frigoboat in Italy.  He was told it uses a keel cooler and is said to have "no moving parts" (?).  He asked if I'd heard of it.  I had not but checked it out on-line. Below is what I found.  However, I am sure Dave (Kindred Spirit) can provide much more information:

Company & Dealer: www.frioboat.com – Frigoboat site provides some information but I found the following dealer site more informative: http://www.firstmatescabin.com/Frigoboat.htm (there are other dealers in the US).
Advantages claimed: No pump, No fan, No noise, more Efficient / uses Less Amps.
Items needed & Cost (listed by above dealer):
1) K50-SCC (Danfoss BD50) compressor, Part # E5197SSC - $706
   (dimensions - 8 5/16" x 10 ¼" x 5 5/8")
2) Keel Cooler unit (with Zincs) , Part # E50722Z or E50361Z - $440
   (out side dimensions – 2 ¾" x ~ 7")
3) Evaporator (vertical for typical C-34 Box), Part # 250B - $205
   (10"w x 11.5"h x 8.5"d)
4) Thermostat (mechanical), Part # E250500 - $34
5) Extension tube set (from compressor to evaporator), comes in 3', 6'    & 10' lengths. Price range $152 for 3' to $175 for 10'. Assume C-34 needs 10 ft length. Part # E50265 - $175

Total: $1560 (plus tax and S&H)

Our 1994 C-34 still has its original A-B unit that came with the boat and uses an air-cooled system (now 10 years old).  Since we will be doing extensive cruising in Florida and the Bahamas this next year, I am wondering if you should consider a keel cooler system like the above.  Any thoughts / suggestion would be appreciated.