To say that I've been waiting a long time for Canon's ultrawide offering to compete with Nikon's 14-24 f/2.8G would be an understatement. I've been waiting (and saving) for years for this lens. I don't normally shoot ultrawide, but I do like the distortion, and perspective it offers for establishing shots when shooting events or video.
I was expecting a 14-24 2.8 similar to Nikon's 14-24, but was surprised when rumors started flying around that it would be WIDER (first, it was rumored to be a 12-24, and the canon pushed the envelope even further with 11mm) -- the f/4 is a bit of a disappointment, but all of canon's f/4 offerings have been stellar performers, and at these focal lengths, it isn't much of a problem.
I placed my order shortly after it was announced, and it's finally shipped. I'll have an unboxing, photos and first impressions as soon as it comes in.