I have a set of Denise needles and rarely use them because I prefer a thinner, more flexible cable. I also find the tips to be more difficult to work with. When I bought needles I had to compromise: I really like the nickel plated ones from Knit Picks Options but prefer the tapered tip of the Sunstrucks which I finally decided on. The tapered tip carried more weight in my decision. I think loose knitters are much more likely to prefer the Denise needles. If the Denise needles fit your style of knitting, you just might love them.
Happiness is catching that dropped stitch while it's still fixable..