The 1554 is very good, there was a rep from New Belgium giving out samples at my local Muni. They call it a black ale but it is really a Lager (the have to call it an ale due to some weird law in Texas about beers with over a 5% ABV). For a dark beer it is very light. Sorry for the off topic post, but is it ever bad to talk about beer???
Back on topic, the 566 was tuned for assisted opening so it may not be fair to expect it to flip like the Southard or Domino that had their detente developed for manual opening. Just a thought... Like I said, mine is very smooth and opens with little or no wrist flick.