Well, this year have had 3 first round interviews.
One of which I fluffed and they promptly (and rightly) told me I wasn't through to the second round a couple of days later.
On the other two, however, the panel appeared to have suffered from a collective delusion and have invited me back for second interviews.
One of these, I have already done (hence the previous question on written exercises - in the end, it was a 45 minute legal essay on any subject of my choice - I chose my 'rant' on parental leave). The other, I have just been told of today. It's a full day interview over the next week. Should have asked what to expect but was, frankly, so stunned to be told that I ended up just saying 'yes' and 'thank you' like a computer says 'no'.
The set is a provincial, criminal set with a small civil team. Any indications of your experiences of day long interviews (even if note in similar sets) would therefore be most welcome - please!