Anybody use a fluid filled damper?

I need a new harmonic balancer/vibration damper for the engine I am going to put together. Looking on ebay I found this Fluid Damper. He makes it sound great, but of course he is trying to sell a product. Anybody use one? My engine will be internally balanced.

http://cgi.ebay.com/ebaymotors/SB-MOPAR-DODGE-318-360-INT-SFI-FLUID-Damper-RP_W0QQcmdZViewItemQQ_trksidZp1713Q2em153Q2el1262Q QcategoryZ33616QQihZ016QQitemZ260275541144


Or should I just go with a steel one like this

http://cgi.ebay.com/ebaymotors/NEW-Mopar-318-340-360-Steel-SFI-Balancer-Chrome-Damper_W0QQcmdZViewItemQQ_trksidZp1713Q2em153Q2el1 262QQcategoryZ33616QQihZ012QQitemZ220382834380
Author: admin