I just bought a TUSA IQ-900 Zen yesterday and have yet to dive with it but I do already have some comments on it. The functionality I read about from the manual (without actually diving with it yet) looks very good, which is why I bought it. However, the following two items arent so good. They arent show-stoppers, but they are kind of sloppy.
(1) I don't like not having the date while in the regular watch mode. The 900 only has the day in the upper third of the face and the time in middle third, with the lower third empty. It does not display the date on the basic watch screen. You can get at the date with a 2-second push of a button, but thats too much. Why not put at least the day of the month (i.e., 1-31) in the lower third of the visible face in watch mode where the digits are available anyway?
(2) I also really don't like the 900's band. The band is not replaceable with other types of bands which, I think, is a big negative. I took the band off and see it is not amenable to other bands. I prefer to use my own watch band. I like the safety-type bands that retain the watch even if one of the pins breaks. I also want a watch band that allows me to wear it bear-wristed before I dress for the dive and then simply allows me to put it on my suit+glove-wrist. The current 900 watch band fits my bare wrist but is too short for over the suit+glove. Tusa provides a band extender, which works, but is quite clumsy. Not only does the extender not provide an elegant solution, it also violates a basic diving tenet that if it aint attached, youre going to lose it. I think tusa ought to provide either a much-better band design (hopefully applicable to my watch Id be glad to pay for a better band if they ever decide to provide one) or a pin design that allows for other bands.
Tom