I 've been wearing TEVA sandals ans shoes for quite a few years now, I'd say I'm a fan already, especially when it comes to sandals.
Now, about Tanza. I've been using it 4 a year now during the hot summer months, walking, city cycling, in water, walking the dog, everywhere ... I'd buy it again without second thought. It's rough, it's stable when your feet get really wet or sweaty, it's bacteria repellent so your feet don't get smelly, no matter what the conditions are, if it's hot and you wanna keep going, that's the perfect sandal. And no, I do not work for TEVA industries!
The size is a bit of an issue, I'd suggest u go a size up in all TEVA sandals, I always do and never had any problems with that rule.
I bought Bombay Brown, the picture is true to image, no artistic tricks to get your money there, the sandal is a piece of art aesthetically and will not come unnoticed.
Believe me, your feet will be thanking u for that purchase!
P.S. I recently used them for a long trekking activity on mt Olympus (from sea level to 2650 mts high) upon various terrains (ground soil, tree roots, rocks etc). The grip was amazing! Also kept my feet ventilated, comfortable and healthy for summit effort next morning. Really substituted any expensive light trekking shoe. And mostly the pair don't seem to have suffered any damage from that "punishment". RESPECT!