Disclaimer: I was not paid by Louet to write this review, but they did give me some double pointed needles as a gift because they're nice!
I have always loved ergonomic products - my parents had one of those chairs that you kneel on for our computer, back when computers printed on those continuous sheets of paper that had the little holes on either side and had to rip apart... Well, now I feel old! Anything from keyboards to crochet hooks, I love things that keep my body from giving out.
These needles are sharp, but not so sharp that they'll split your yarn accidentally. Louet also has traditional round double pointed needles, which they call "multi-pointed" needles, that are sharper on one end than the other. Since you mostly only knit with one side, you can always knit with either a sharp or less sharp point as you move along your round.
How do these square needles compare to round needles? When it comes to gauge, here's what Louet has to say: "Due to the difference in SquareTM needles compared to traditional round needles, we STRONGLY, recommend you knit a swatch to check your gauge. Please Note - most knitters go up one needle size in circulars and DPN's to obtain gauge."
If you like really clicky needles, these might not be the needles for you. I like a medium amount of click, so they're perfect for me.
At TNNA this past June, my amazing, wonderful, thoughtful coworkers bought me a whole set of Kollage circular needles. I was so surprised and happy, I had to choke back some tears. These needles were a wonderful gift that I would gladly have bought for myself. I highly recommend them because I think you'll enjoy them, too!