This film is the opposite of Reala. It makes images into a fantasy - which can be a dream or a nightmare. As with most slide film the grain is barely there. It is incredibly critical to expose it properly - the multi-spot metering of the T90 may help you there. Many people also use graduated ND filters with it.
Not a film to use for portraits, though it might work for African skin tones.
Soft lighting works best for this film, because it is so contrasty already. You get very little exposure latitude.
But when you hit it with Velvia, it's incredible.
Half-stop exposure bracketing is recommended, along with a dedicated light meter.