I've just found this on the Polish Figure Skating Association website: http://www.pfsa.com.pl/docs/WalleySeminar14.pdf

The seminar will be run by the team who has recently conducted the ISU Development Trophy: Valentin Nikolaiev (who coached Baiul and Zagorodniuk), coach and choreographer Jena Gres and coach and ISU technical specialist Sarkis Tewanian,

From what I heard, they are all very good at this, their exercises are challenging and creative and Tewanian is great at giving feedback on the levels and finding ways of increasing them with minimum effort. So I'd recommend it.