I've been wearing these shoes for over a month, sport climbing on the east coast. They have performed excellently in all arenas: from steep sloper-jugs, to techy slaps. if where you are climbing, requires a lot of smearing and twisting, these are the shoes. Because the "No-Edge" rands, you can really twist and roll around on your toes, without worrying about a foot pop. This allows for intuitive movement, and quick foot placements. However, if you require power edging, these shoes do not provide excellent support.
The unlined, leather uppers are incredibly comfortable, and stretch a lot. The have a similar to the Miura VS's. Once they are broken in, they do not feel real aggressive. The glue La Sportiva uses is rather weak. Parts of the rand, and the toe patch are starting to separate from the shoe, as the rubber has a bulky fit on the shoe. I had the same problem with the Rubber splitting on from the heel.
My other shoes
La Sportiva Boulder X: 42.5 (street fit)
La Sportiva Lace-up Katana: 39.5 (comfort/tight fit)
La Sportiva Testarossa: 38.5 (tight fit)
La Sportiva Solution: 38.5 (very tight fit)
La Sportiva Futura: 38.5 (comfort/tight fit)
I thought these broke in rather quickly; after a few pitches.