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