I put my 35L up for sale and before I knew it it had sold I had received my paypal money and the lens was gone. The reason for this was to purchase a 24LII. I wanted the same qualities as the 35L with a little more width. There was only one other lens that could do this.
Everywhere I called was out of stock, except for one place and ironically they were also the cheapest. Maybe this was a sign.
I did get cold feet, due to the cost, but in the end after revisiting all the alternatives I realised there wasn't any. The 24L it was.
Today I received my new lens. I don't have a 77mmUV but luckily I had a 77 - 72 adapter.
I had a bad experience with my 35L, my first copy was soft and then I had to send the other to Canon twice. I was seriously hoping this wasn't going to be the case.
Having fired a few test shots, I have been totally amazed by the quality. It's so much sharper than the 35L wide open and there is almost no difference between f1.4 and f2 - super sharp. I ran a couple of focus test shots and it performed perfectly, too.
I am very happy with this lens, yes it's expensive but so far I think it's been worth it over the 35L. Plus its weather sealed, which gives it a nice solid feel when on the camera, my other lenses have a tiny bit of play.
Oh and I'm using it on a 40D (5/7D later in the year).
I'll get a few test shots shortly.