La Sportiva Katana
Price Paid: $125
Awesome shoes! If you're doing advanced bouldering (v7+) you may want something a little more sensitive and down-pointing, but for intermediate bouldering these shoes are fantastic.
The Good: Almost everything! Great for edging, smearing, and heel-hooking. Rubber stickiness is excellent and sensitivity is good. These shoes look cool, fit great, and have the best Velcro system of any shoe I've ever tried; the wide straps strap down tight and you get some customization in terms of where you want the straps affixed due to the large circular Velcro patches.
Also the opposing-direction straps (one strap pulls one way, one the other way) provide a balanced fit, whereas most Velcro shoes feel like they're being pulled to one side. These shoes stretch very little...how they feel in the store is pretty much how they'll feel a couple of months down the road; so don't buy a painfully tight size thinking they'll loosen up a lot...they won't.
Lastly, the shoes feel very well made and they're made in Italy.
The Bad: The trim around the heel cup digs into your Achilles area somewhat — it's not terrible but definitely noticeable. However, over time it does soften up and becomes more comfortable (I don't notice the issue at all anymore). Also, the metal "rung" that the lower Velcro strap passes through can be felt on your foot (on the inside of the shoe). I haven't noticed it being a problem/painful while climbing, but it's still worth noting.
Overall I love these shoes and highly recommend them. When these wear out, I suspect I will replace them with an identical pair.
For sizing: they are a bit on the narrow side, but wide enough for me. Prior to these I had the Evolv Pontas which were so narrow that my big toe would tuck under the toe next to it, even though I only downsized 1/2 size.
The Katanas are about 1/3" wider than the Pontas and fit my foot just right...but if you have wide feet, the Katana may be too narrow for you. For sizing, I would go down one full size from your street-shoe size for comfort. 1 1/2-2 sizes for performance (you can go smaller but they are going to be punishingly tight).
The best pair of rock shoes I've ever owned!
They are extraordinarily comfortable for a pair of technical shoes, and have performed well on a variety of surfaces, even out performing (to my delight) my more technical shoes. I would highly recommend these to any level of climber, for the money (they generally aren't cheap) it really is worth it.
I noticed that some reviews mention there being a problem with their durability - While I am on to my second pair of these, the first pair lasted a good year (climbing 3 times a week on various surfaces) without any problems (other than the usual wear down to be expected), and the second pair are still going strong...
Love climbing, hate killing your feet for it? These are the shoes for you...
Use: hard sport climbs
Price Paid: $135
All my Sportiva shoes have fallen apart. I have a pair of Katanas that "perform" very well on the rock. However, they have delaminated terribly and require constant re-gluing to keep them from falling apart. This also happened on my Sportiva Mythos and Megas.
The resole shop that I frequent says that they get a lot of complaints about Sportiva shoes and that they have problems because they are not cleaned thoroughly before they are assembled. I no longer buy Sportiva products.
Also, when I sent messages to Sportiva N.A. customer service, they never responded. How bad is that?! They suck!
Break-in Period: 2 weeks
Price Paid: $70
I've been climbing for 1.5 years now and own currently 7 pairs of climbing shoes. This is by far the best climbing shoe I've had, it is very technical, but very comfortable. I had a pair of Vipers before and although they had great grip, taking them off was a pain, whereas the Katana are easy to put on and remove, and with the velcro you adjust how tight you want them. I have used it indoors, on granite and basalt, and has always excelled! Great sport climbing shoe.
Down side? After using it 2-3 times a week, had to resole them after 3 months.
Price Paid: $119
Used these shoes on granite and limestone sport and sometimes in the gym. Great edging and hooking (both toe and heel) abilities! Bought these snug (I'm a size 12 and got a 43) and they took a little breaking in, about 2-3 wks. Only drawback was the wear. After 3 months of regular use (1-2 times/wk) the toe rubber started delaminating.
Use: Indoor bouldering
Break-in Period: no time at all
Price Paid: $103
I manage an indoor rock climbing gym and just recently bought a pair of Katanas. I've owned four other brand name shoes, but have already enjoyed these the most. The dual direction velcro makes for a great fit, they're extremely comfortable, they climb awesome, and on top of all of that, they look really cool!
All Katana versions
In addition to the 6 men's reviews above, there is 1 review for another version of the Katana.