Tokina 12-24 f4 Play

So, I've been out and about with the new superwide Tokina 12-24 and I love the perspective it allows me to shoot. I've always been a wide angle shooter and at 12mm I can now play in much tighter spaces. I had read that the lens was a tad soft at f4 and it is noticeable at the corners, especially at 12mm. However, the lens sharpens nicely at 5.6. I likely won't be shooting much at f4 anyway. The purpose of this lens was to give me a wider field of view, and to give me a little backup coverage for weddings. The 24mm gives me that and weddings will be shot at f8-f10 with a flash anyway....It's not flawless, but at $399 it is a very smart buy for me.