Szu-Ping Leewrote a review of Tenaya Tatanka Climbing Shoe - Men's on September 12, 2016
Familiarity: I've used it once or twice and have initial impressions
Fit: True to size
I bought the Tatanka, thinking that it will be a little more aggressive than Masai which I have used for several months and liked. It turns out they are almost identical. The main difference is that Tatanka's closure system provides more side support (the orange straps). When outside-edging it feels more stable than the Masai. Otherwise the fit is just about identical which is not necessarily a bad thing. These shoes are quite comfortable. For those who are interested in Tenaya shoes, you need to know that they are narrow. Much narrower than my Scarpa Thunder and Evolve Shaman and Astroman. But interestingly, they are not uncomfortable, likely due to the very supple upper that don't put pressure on your toe knuckles when they are curled. The narrowness of the profile contributes to edging precision and security. The length seems to be true to size. I wear 11.5 or 12 street shoes and order them in 11.5.
With both pairs of shoes, my biggest complain is the bagginess of the heels. Maybe I have narrow heels but I also read other people sharing the same comment. On the other hand if you have fat heels (and narrow forefoot), these will be perfect for you. That being said, these are not marketed as bouldering shoes, and my occasional heel hooks were not too insecure. I use these shoes mostly in the gym. I climb at 5.11 level.