You'll definitely hear from both sides of the fence on this topic! Some people love these needles and others hate them. There's just no accounting for preference!
Personally, I have a mixed bag of needles--Boye interchangeable needles (great for "sticky" yarns), Clover Takumi bamboo circulars and DPNs, Cubics circulars, Knitter's Pride Dreamz DPNs, and a hodge-podge of straight needles that people have given me.
Glad to hear you're learning to love your Denise needles. I hope they serve you well.
Denise was my very first experience with interchangeable circs. I certainly do love how easy they connect, plus the way you can 'invent' any length you want with all those spare cable pieces and connectors.
I did like using them a lot. I remember them being very warm in my hands, buttery in feel. Nicely pointed and accurate. I liked their 'quietness', too. Altogether, very pleasant to work with.
My knitting changed, and the Denise cables became a bit of a hindrance to my speed. Not that speed is my priority. But they simply couldn't keep pace with my yarn type and stitches. I still have my Denise circs, in boring original gray.
Denise stalks are extra long, aren't they a bit? I think they are. This could also contribute to your great experience with them. People with larger hands like that extra length to grasp onto. I also like the longer stalks, even though my hands are smallish.