This pen is absolutely fabulous, there is no other way to describe it!
I bought it in a stationery shop in Germany while I was on holiday there, and I didn't regret it for a moment! The pen writes so smoothly, you'd think you were writing with a £100+ pen, not a cheap £13 one. The nib is quite broad, but it looks very nice and there is no scratching sensation as I have found with other pens. It is worth buying the Z24 converter so you can use bottled ink, as this is much cheaper than buying cartridges, and I just like the old-fashiondness of writing like this. The pen uses a fair amount of ink when using this medium nib, so using bottled ink is vital if you want to keep the cost down.
All in all, a great first pen, or even a pen for enthusiasts who just want a damn good pen!
EDIT: This pen is no longer £13 as previously stated, due to the fact that this is a limited edition pen, and is no longer in production. Therefore the price has risen to around £30 as of 5/12/12. The pen however is still going strong despite being thrown around during a school day and writing many pages each day.