Indispensable..
I agree with the comments about the cap on the tip (lost it months ago), but the pen is worth it's weight in gold - provided you know the risks.
Recording audio is actually subject to law in various countries - in the UK you are allowed to record without seeking permission, but it renders anything you use the audio for unadmissable in court. (AFAIK, IANAL). In other countries it can be straightforward illegal.
Having said that, if you don't use the voice recording it's one of the best ways to take notes - and the word search facility is so good it even works with my handwriting - try to find words in all your notes is not hard.
Especially if you deal with confidential clients this pen gives you the advantage of an empty notebook on visit, but a collection on your laptop - but I had to wrap a Truecrypt container around the storage to secure it..
All in all, I love it. I use the A5 + folder - that's the only sensibe place for this pen..