I think you mean the Easy Wood Chuck.  I have one.  When they came out they were $500 which I though was too much.  The price dropped to $400 which I still thought was too much.  Then Craft Supplies had them on sale earlier this year for $320 so I bought one.  Know that the jaws cost $69 per set though.  I have not seen them on sale.   The convenience has been worth it to me to have some different sets of jaws  on hand for quick changes.   Also there was a 3 month backorder on the chucks.  
Some will say to just pick a particular brand and then get the jaws for it.   I'm in no way critical of that argument.  However, I bought my various chucks over a 20 year period and some had good improvements during that time period.  If the Easy Wood Chuck and jaws were out when I started and I bought it and all the jaw sets then, things would have been a lot easier for me.   YMMV