From experience having seen and sold a few, they are IMO a very nice bat. I echo comments which talka bout how good and refreshing it is from Kooks to use a different shape from the usual ones.
However, they didn't go well for us at all. I think the fact we only really found them in 2'10 and above (with some exceptions, but predominantly heavy or medium), and the lack of any sort of light pick up, has resulted in them being a bat the customer discards in store based predominantly on the feel in the hands.
It's a shame - if they relaunched it with say a shorter blade as is the fashion nowadays, I think they'd be really popular and be able to address the concerns. Hope it doesn't fade away - the all black stickers are gorgeous in the flesh!
CBD