Just came across this, reading peoples posts...

Can anyone tell me their opening times? Particulary on a Saturday?

I'm in A'dam very briefly this w/e or next.

Thanks in advance

You're out of luck on a saturday, I think.
A sign in the door a few weeks ago said the hours were 11am-9pm, Monday to Friday. I read that at about 6pm on a Sunday, so I was back there at 1105 the next morning , first client.
The doorbell rang more than half-a-dozen times in the following half hour.
Well worth a visit if you can find the time!