The name of Ventracor's device is "VENTRASSIST".
It has no bearings, therefore it is better than this:
http://www.ozestock.com.au/MessageView.asp?Symbol=VCR&PostID=249526
And it ought to be better than this:
http://www.ozestock.com.au/MessageView.asp?PostID=249497&Symbol=VCR
So, what beats the VENTRASSIST?
Answ: NOTHING. imho
Gerry
Please do your own research and you decide if and when to buy, hold or sell.