I've just purchased an Airbeam Velocity 300 - due to arrive tomorrow or the next day and I'll be pitching it this weekend. It's a lot smaller than the Utopia but is only intended for me on my own and I'll use that in place of the Icarus 300.
I'll post a review on it soon, but from what I've read the 2011 range had some PSI issues whereas the 2012 range seems to have outstanding reviews and they appear to withstand quite a lot of bad weather.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.