This is an oddity in a way, in that it's a very common plant, but one we use quite rarely.
There's a whole group of fairly similar looking white variegated Dracaenas like this (as previously blogged). At Stewarts, purely historically, we tend to favour Dracaena Ulysses, which is just a trace less high-contrast than D. White Stripe. This was a tendency I inherited when I started in 2002 and it's a hard habit to break. My previous firm in London used White Stripes, and I am trying to throw a few in the mix here.
As usual, here's a bit of info on the plant. Like all Dracaenas, they like to be kept warm. Being variegated, D. White Stripe does not like super-low light but it's pretty tolerant. As one of the Deremensis side of the family (the ones with soft stems the same colour as the foliage), they don't enjoy being handled or touched too much, so aren't a great choice for high-traffic areas.
Finally: why does Michelle like them so much? In her words: "they look classy, bold and they are smart". She also agrees with me that they look very effective in black or dark grey pots.
Jonathan